Patent US4392243A successfully refreshed from Google Patents.
US4392243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transceiver having interphone system
Assignee: Faurecia Clarion Electronics Co Ltd
•
Filing: 1981-04-09
•
Granted: 1983-07-05
•
Expires: 2001-04-09
Abstract
Abstract A transceiver having an interphone system which is comprised of two transmitter and receiver units, a transceiver, an interphone and switching means for selectively connecting the transmitting and receiving units to the transceiver or the interphone.
Inventors
- 👤 Shiro Ohhashi
- 👤 Fumiyoshi Ubusawa
- 👤 Shoji Iwasaki
- 👤 Tetsuyuki Manaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:40
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/44; H04B1/3822
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
103 words
A transceiver having an interphone system, comprising: two microphones; two audio transducers; two manually operable switches; radio transmitter means; radio receiver means connected to said transducers; an interphone circuit; first and second switch means each responsive to a respective one of said manually operable switches for selectively connecting a respective one of said microphones to one of said interphone circuit and said radio transmitter means; and first and second muting means operatively coupling said interphone circuit to respective ones of said transducers and responsive to signals output to said transducers by said radio receiver means for muting output signals from said interphone circuit.
Claim 2
Dependent Claim
103 words
A transceiver having an interphone system, comprising: two microphones; two audio transducers; two manually operable switches; radio transmitter means; radio receiver means connected to said transducers; an interphone circuit; first and second switch means each responsive to a respective one of said manually operable switches for selectively connecting a respective one of said microphones to one of said interphone circuit and said radio transmitter means; and first and second muting means operatively coupling said interphone circuit to respective ones of said transducers and responsive to signals output to said transducers by said radio receiver means for muting output signals from said interphone circuit.
Claim 3
Dependent Claim
98 words
A transceiver having an interphone system, comprising: two microphones; two audio transducers; two manually operable switches; radio transmitter means; radio receiver means; an interphone circuit connected to said transducers; first and second switch means each responsive to a respective said manually operable switch for selectively connecting a respective said microphone to one of said interphone circuit and said radio transmitter means; and first and second muting means operatively coupling said radio receiver means to respective said transducers and responsive to signals output to said transducers by said interphone circuit for muting output signals from said radio receiver means.
Claim 4
Dependent Claim
98 words
A transceiver having an interphone system, comprising: two microphones; two audio transducers; two manually operable switches; radio transmitter means; radio receiver means; an interphone circuit connected to said transducers; first and second switch means each responsive to a respective said manually operable switch for selectively connecting a respective said microphone to one of said interphone circuit and said radio transmitter means; and first and second muting means operatively coupling said radio receiver means to respective said transducers and responsive to signals output to said transducers by said interphone circuit for muting output signals from said radio receiver means.
Claim 5
Dependent Claim
100 words
A transceiver having an interphone system, comprising: two microphones; two audio transducers; two manually operable switches; radio transmitter means; radio receiver means; an interphone circuit; first and second mixing means for mixing an output from said interphone circuit and an output from said radio receiver means to obtain respective mixed outputs and for supplying said mixed outputs to respective ones of said transducers; and first and second switch means each responsive to a respective one of said manually operable switches for selectively connecting a respective one of said microphones to one of said interphone circuit and said radio transmitter means.
Claim 6
Dependent Claim
100 words
A transceiver having an interphone system, comprising: two microphones; two audio transducers; two manually operable switches; radio transmitter means; radio receiver means; an interphone circuit; first and second mixing means for mixing an output from said interphone circuit and an output from said radio receiver means to obtain respective mixed outputs and for supplying said mixed outputs to respective ones of said transducers; and first and second switch means each responsive to a respective one of said manually operable switches for selectively connecting a respective one of said microphones to one of said interphone circuit and said radio transmitter means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-04 | 1987-01-03 | 1987-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-04 | 1991-01-03 | 1991-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-04 | 1995-01-03 | 1995-07-05 | $7700.00 | Window Closed / Lapsed |