US5327481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio communication device and cordless answer phone
Assignee: Rohm Co Ltd
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Filing: 1992-09-10
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Granted: 1994-07-05
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Expires: 2012-09-10
Abstract
Abstract A radio communication device and a cordless answer phone including base and hand sets connected with each other by radio and having a message recording and reproducing device is capable of improving sound quality of messages recorded and reproduced. A pair of switches are connected between a radio transmission and receiving device and a compandor having a compressor and an expander for the radio communication between the base and hand sets, and the sound quality improvement function of the compandor is used in recording and reproducing an answer message and a telephone message. When the message is recorded in the message recording and reproducing device, the amplitude of the sound signals is compressed, and after the compressed message is reproduced from the message recording and reproducing device, the amplitude of the sound signals of the message is expanded to enable the improvement of the sound quality.
Inventors
- 👤 Masashi Horimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:58
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/72; H04M1/725; H04M1/60; H04M1/64; H04M1/65; H04M1/6505
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
182 words
A cordless answer phone for performing a conversation between a base set and at least one hand set by a radio signal, comprising: recording and reproducing means having a record terminal and a play terminal for recording and reproducing an answer message of a telephone subscriber and a telephone message input from a telephone subscriber line; means for compressing an amplitude of a sound signal of the answer message and the telephone message; means for expanding the amplitude of the sound signal of the answer message and the telephone message; radio transmitting and receiving means having a transmitting part and a receiving part for performing a radio connection between the base set and the at least one hand set; first switch means for selectively connecting the record terminal of the recording and reproducing means with either the compressing means or the transmitting part of the radio transmitting and receiving means; and second switch means for selectively connecting the play terminal of the recording and reproducing means with either the expanding means or the receiving part of the radio transmitting and receiving means.
Claim 2
Dependent Claim
182 words
A cordless answer phone for performing a conversation between a base set and at least one hand set by a radio signal, comprising: recording and reproducing means having a record terminal and a play terminal for recording and reproducing an answer message of a telephone subscriber and a telephone message input from a telephone subscriber line; means for compressing an amplitude of a sound signal of the answer message and the telephone message; means for expanding the amplitude of the sound signal of the answer message and the telephone message; radio transmitting and receiving means having a transmitting part and a receiving part for performing a radio connection between the base set and the at least one hand set; first switch means for selectively connecting the record terminal of the recording and reproducing means with either the compressing means or the transmitting part of the radio transmitting and receiving means; and second switch means for selectively connecting the play terminal of the recording and reproducing means with either the expanding means or the receiving part of the radio transmitting and receiving means.
Claim 3
Dependent Claim
173 words
The cordless answer phone of claim 1, wherein the base set includes the recording and reproducing means, the compressing means, the expanding means, the radio transmitting and receiving means, the first switch means and the second switch means, wherein the first switch means connects the compressing means with the record terminal of the recording and reproducing means when the messages from the telephone subscriber line and the base set are recorded, and connects the receiving part of the radio transmitting and receiving means with the record terminal of the recording and reproducing means when the messages from the hand set is recorded, and wherein the second switch means connects the expanding means with the play terminal of the recording and reproducing means when the message is sent out on the telephone subscriber line and the message is reproduced by the base set, and connects the transmitting part of the radio transmitting and receiving means with the record terminal of the recording and reproducing means when the message is reproduced by the hand set.
Claim 4
Dependent Claim
180 words
The cordless answer phone of claim 1, wherein the hand set includes the recording and reproducing means, the compressing means, the expanding means, the radio transmitting and receiving means, the first switch means and the second switch means, wherein the first switch means connects the receiving part of the radio transmitting and receiving means with the record terminal of the recording and reproducing means when the messages from the base set and the telephone subscriber line via the base set are recorded, and connects the compressing means and receiving means with the record terminal of the recording and reproducing means when the message from the hand set is recorded, and wherein the second switch means connects the transmitting part of the radio transmitting and receiving means with the play terminal of the recording and reproducing means when the message is sent out on the telephone subscriber line and the message is reproduced by the base set, and connects the expanding means with the record terminal of the recording and reproducing means when the message is reproduced by the hand set.
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) | 1997-07-04 | 1998-01-03 | 1998-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-04 | 2002-01-03 | 2002-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-04 | 2006-01-03 | 2006-07-05 | $7700.00 | Window Closed / Lapsed |