US4881259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Answering machine with cordless telephone
Assignee: Cobra Electronics Corp
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Filing: 1989-01-06
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Granted: 1989-11-14
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Expires: 2009-01-06
Abstract
Abstract A cordless telephone and an answering machine of the remote-pickup type are provided as an integrated unit having the answering machine and telephone base unit integrated into a common housing. The remote handset contains circuitry for generating a command signal condition at the user's option which will operate the base unit to a "screening mode" wherein the activity on the telephone lines during the playback and record period is transmitted to the remote unit, but wherein audio pass-through from the base unit radio receiver is disabled. In the preferred form of the invention the command signal condition is in the form of a pilot tone of a given frequency, receipt of which by the base unit receiver disables audio pass-through. To enter two-way "talk" mode, a pilot tone of different frequency is also sent by the remote unit, loss of this tone being being to cause the base unit to cease transmitting to the remote unit.
Inventors
- 👤 James Scordato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:59
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/64; H04M1/65; H04M1/66; H04M1/663; H04M1/72; H04M1/724; H04M1/72403; H04M1/72409; H04M1/72415; H04M1/725
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
219 words
In combination with a telephone answering machine having connector means for making connection to telephone lines, said answering machine including recording and playing means operable to a playing mode for sending out onto telephone lines a recorded announcement and to a recording mode for recording incoming messages thereafter, and system control means operable between an active mode establishing communication between said telephone lines and telephone means and a passive mode establishing communication between said telephone lines and said recording and playing means: telephone means in the form of a cordless telephone means including a base unit and a portable handset each having transmitter and receiver means, said base unit transmitter including means for transmitting to said handset receiver means ringing signals and incoming messages received from said telephone lines, said handset transmitter means having means for transmitting to said telephone lines through said base unit receiver means voice communications from the user and command means for transmitting to said base unit receiver means user-chosen control signal conditions, said system control means including means responsive to receipt of said control signal conditions by said base unit receiver means for operating said system control means between said active and passive modes, and said recording and playing means, said system control means, and said base unit are contained within a common housing.
Claim 2
Dependent Claim
219 words
In combination with a telephone answering machine having connector means for making connection to telephone lines, said answering machine including recording and playing means operable to a playing mode for sending out onto telephone lines a recorded announcement and to a recording mode for recording incoming messages thereafter, and system control means operable between an active mode establishing communication between said telephone lines and telephone means and a passive mode establishing communication between said telephone lines and said recording and playing means: telephone means in the form of a cordless telephone means including a base unit and a portable handset each having transmitter and receiver means, said base unit transmitter including means for transmitting to said handset receiver means ringing signals and incoming messages received from said telephone lines, said handset transmitter means having means for transmitting to said telephone lines through said base unit receiver means voice communications from the user and command means for transmitting to said base unit receiver means user-chosen control signal conditions, said system control means including means responsive to receipt of said control signal conditions by said base unit receiver means for operating said system control means between said active and passive modes, and said recording and playing means, said system control means, and said base unit are contained within a common housing.
Claim 3
Dependent Claim
25 words
The combination of claim 1 wherein said common housing has an open-top recess into which said handset is stored and charged when not in use.
Claim 4
Dependent Claim
257 words
In combination with a telephone answering machine having connector means for making connection to telephone lines, said answering machine including recording and playing means operable to a playing mode for sending out onto telephone lines a recorded announcement and to a recording mode for recording incoming messages thereafter, and system control means operable between an active mode establishing communication between said telephone lines and a telephone means and a passive mode establishing communication between said telephone lines and said recording and playing means: telephone means in the form of cordless telephone means including a base unit and a portable handset each having transmitter and receiver means, said base unit transmitter means including means for transmitting to said handset receiver means ringing signals and incoming messages received from said telephone lines, said handset transmitter means having means for transmitting to said telephone lines through said base unit receiver means voice communications from the user and command means for transmitting to said base unit receiver means user-chosen normal and screening control signal conditions, said base unit receiver means including means responsive to receipt of said normal control signal condition for operating said system control means from said passive to said active mode, means responsive to receipt of either said normal or said screening control signal conditions for actuating said base unit transmitter means to transmit incoming messages from said telephone lines, and screening means responsive to receipt of said screening control signal condition for preventing placing a signal condition on said telephone lines indicating that the user is listening.
Claim 5
Dependent Claim
257 words
In combination with a telephone answering machine having connector means for making connection to telephone lines, said answering machine including recording and playing means operable to a playing mode for sending out onto telephone lines a recorded announcement and to a recording mode for recording incoming messages thereafter, and system control means operable between an active mode establishing communication between said telephone lines and a telephone means and a passive mode establishing communication between said telephone lines and said recording and playing means: telephone means in the form of cordless telephone means including a base unit and a portable handset each having transmitter and receiver means, said base unit transmitter means including means for transmitting to said handset receiver means ringing signals and incoming messages received from said telephone lines, said handset transmitter means having means for transmitting to said telephone lines through said base unit receiver means voice communications from the user and command means for transmitting to said base unit receiver means user-chosen normal and screening control signal conditions, said base unit receiver means including means responsive to receipt of said normal control signal condition for operating said system control means from said passive to said active mode, means responsive to receipt of either said normal or said screening control signal conditions for actuating said base unit transmitter means to transmit incoming messages from said telephone lines, and screening means responsive to receipt of said screening control signal condition for preventing placing a signal condition on said telephone lines indicating that the user is listening.
Claim 6
Dependent Claim
30 words
The combination of claim 3 wherein said screening means includes means for preventing said base unit receiver means from passing to said telephone lines voice communications received from said handset.
Claim 7
Dependent Claim
77 words
The combination of claim 4 wherein said handset includes pilot tone generating means for generating said screening control signal condition as a screening pilot tone modulating the output of said handset transmitter means, and said base unit screening means includes screening pilot tone detection means responsive to receipt of said screening pilot tone from said base unit receiver means for preventing passage of voice audio frequency information from said base unit receiver means to said telephone lines.
Claim 8
Dependent Claim
87 words
The combination of claim 5 wherein said handset includes normal tone generating means for generating said screening control signal condition as a normal pilot tone modulating the output of said handset transmitter means, and said base unit receiver means includes normal pilot tone detection means responsive to receipt of said normal pilot tone to operate said base unit transmitter means to transmit to said handset incoming voice communications received from said telephone lines and to operate said system control means from said passive to said active mode.
Claim 9
Dependent Claim
37 words
The combination of claim 6 wherein said system control means when in said active mode includes means responsive to the loss of both pilot tones by said base unit receiver means for reverting to said passive mode.
Claim 10
Dependent Claim
56 words
The combination of claim 7 wherein said base unit receiver means has associated therewith low-pass filter means for strongly attenuating transmission to said telephone lines of signals above a given cutoff frequency, said frequencies of said screening and non-screening pilot tones are different from each other, and said pilot tone frequencies are above said cutoff frequency.
Claim 11
Dependent Claim
66 words
The combination of claims 3, 4, or 6 wherein said handset transmitter means includes means for transmitting an identification code to said base unit receiver means and said system control means includes inhibiting means responsive to receipt of said identification code by said base unit receiver means for preventing transmission of incoming voice messages by said base unit transmitter means until said identification code is received.
Claim 12
Dependent Claim
28 words
The combination of claims 3, 4, or 6 wherein said recording and playing means, said system control means, and said base unit are contained within a common housing.
Claim 13
Dependent Claim
25 words
The combination of claim 10 wherein said common housing has an open-top recess into which said handset is stored and charged when not in use.
References Cited (Backward Citations)
GB2051520A
Cited
JPS5824245A
Cited
JPS58138134A
Cited
US4500752A
Cited
US4499567A
Cited
US4571457A
Cited
JPS5936438A
Cited
US4747124A
Cited
US4481382A
Cited
US4475009A
Cited
US4625081A
Cited
JPS59100659A
Cited
JPS6085632A
Cited
US4680785A
Cited
US4640987A
Cited
US4706274A
Cited
US4650931A
Cited
US4794637A
Cited
US4782508A
Cited
US4797909A
Cited
JPS62241443A
Cited
US4759052A
Cited
US4747122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-13 | 1993-05-15 | 1993-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-13 | 1997-05-15 | 1997-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-13 | 2001-05-15 | 2001-11-14 | $7700.00 | Window Closed / Lapsed |