Patent US5687218A successfully refreshed from Google Patents.
US5687218A
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US
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Cordless telephone
Assignee: Canon Inc
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Filing: 1994-01-24
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Granted: 1997-11-11
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Expires: 2014-01-24
Abstract
Abstract A cordless telephone connected through a radio line to a master unit enclosing a telephone line comprises: a receiver to receive a radio signal; a memory to store a plurality of ID numbers; and a speaker which rings when the ID number received by the receiver coincides with either one of the ID numbers stored in the memory. The speaker has a display to display the coincident ID number. With the apparatus of the invention, the operator can make a speech of monitor an absence recorded message by a slave unit at a remote position away from the master unit by certainly recognizing the called slave unit through a monitor sound or an indication lamp.
Inventors
- 👤 Toru Nakayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:33
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/72; H04M1/725; H04M1/727; H04M1/733; H04M1/64; H04M1/642
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 words
A cordless communication system comprising a plurality of base units and a remote unit, wherein the plurality of base units include manual requesting means for generating registration requests in accordance with a manual operation at the plurality of base units, and transmit identification data in accordance with registration requests and call data including the identification data in accordance with generation of a call, and the remote unit receives and registers the identification data from the plurality of base units in a registration mode, and displays such that each of states of the plurality of the base units is distinguishable based on the identification data included in the call data from the plurality of base units and the registered identification data.
Claim 2
Dependent Claim
120 words
A cordless communication system comprising a plurality of base units and a remote unit, wherein the plurality of base units include manual requesting means for generating registration requests in accordance with a manual operation at the plurality of base units, and transmit identification data in accordance with registration requests and call data including the identification data in accordance with generation of a call, and the remote unit receives and registers the identification data from the plurality of base units in a registration mode, and displays such that each of states of the plurality of the base units is distinguishable based on the identification data included in the call data from the plurality of base units and the registered identification data.
Claim 3
Dependent Claim
18 words
A system according to claim 1, wherein the remote unit receives the identification data as a radio signal.
Claim 4
Dependent Claim
21 words
A system according to claim 1, wherein the remote unit displays at least busy/idle states of the plurality of base units.
Claim 5
Dependent Claim
22 words
A system according to claim 1, wherein the remote unit has selecting means for selecting one of the plurality of base units.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-11-10 | 2001-05-12 | 2001-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-10 | 2005-05-12 | 2005-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-10 | 2009-05-12 | 2009-11-11 | $7700.00 | Window Closed / Lapsed |