US4747158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cordless communications system
Assignee: Dataproducts New England Inc
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Filing: 1986-10-01
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Granted: 1988-05-24
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Expires: 2006-10-01
Abstract
Abstract A cordless communications system wherein transmission is made and received via magnetic lines of induction comprises a base station and at least one mobile station wherein the base station receives and transmits voice or data signals at different frequencies. A PIGLER unit is selectively disposed between the base station and mobile station so as to extend the range of the communications system.
Inventors
- 👤 Joshua I. Goldberg
- 👤 Benjamin G. Lardiere, Jr.
- 👤 Bruce E. McCoy
- 👤 John J. Riter, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:19
CPC Classifications
H; H04; H04B; H04B5/00; H04B5/20; H04B5/24; H04B5/26; H04B5/40; H04B5/48
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
285 words
A cordless communications system wherein transmission is made and received via magnetic lines of induction comprising: a base station, at least one mobile station and at least one PIGLER unit disposed between said base station and said at least one mobile station; said base station having a first base magnetic loop antenna and a second base magnetic loop antenna for transmission and reception of magnetic signals, base transmitting means coupled to said first base magnetic loop antenna for transmitting a first signal to said PIGLER unit, base receiving means coupled to said second base magnetic loop antenna for receiving a second signal from said PIGLER unit; said at least one mobile station having a mobile magnetic loop antenna coupled to an antenna switch having first and second operating positions, mobile receiving means coupled to said mobile magnetic loop antenna when said antenna switch is in said first position for receiving said first signal from said PIGLER unit, mobile transmitting means coupled to said mobile magnetic loop antenna when said antenna switch is in said second position for transmitting said second signal to said PIGLER unit; and said at least one PIGLER unit having a first PIGLER loop antenna proximate to said base station and a second PIGLER loop antenna proximate to said at least one mobile station and means for coupling said first PIGLER loop antenna to said second PIGLER loop antenna wherein said first PIGLER loop antenna receives said first signal from said base transmitting means and retransmits said first signal to said second PIGLER loop antenna and wherein said second PIGLER loop antenna receives said second signal from said mobile transmitting means and retransmits said second signal to said first PIGLER loop antenna.
Claim 2
Dependent Claim
285 words
A cordless communications system wherein transmission is made and received via magnetic lines of induction comprising: a base station, at least one mobile station and at least one PIGLER unit disposed between said base station and said at least one mobile station; said base station having a first base magnetic loop antenna and a second base magnetic loop antenna for transmission and reception of magnetic signals, base transmitting means coupled to said first base magnetic loop antenna for transmitting a first signal to said PIGLER unit, base receiving means coupled to said second base magnetic loop antenna for receiving a second signal from said PIGLER unit; said at least one mobile station having a mobile magnetic loop antenna coupled to an antenna switch having first and second operating positions, mobile receiving means coupled to said mobile magnetic loop antenna when said antenna switch is in said first position for receiving said first signal from said PIGLER unit, mobile transmitting means coupled to said mobile magnetic loop antenna when said antenna switch is in said second position for transmitting said second signal to said PIGLER unit; and said at least one PIGLER unit having a first PIGLER loop antenna proximate to said base station and a second PIGLER loop antenna proximate to said at least one mobile station and means for coupling said first PIGLER loop antenna to said second PIGLER loop antenna wherein said first PIGLER loop antenna receives said first signal from said base transmitting means and retransmits said first signal to said second PIGLER loop antenna and wherein said second PIGLER loop antenna receives said second signal from said mobile transmitting means and retransmits said second signal to said first PIGLER loop antenna.
Claim 3
Dependent Claim
26 words
A cordless communications system according to claim 1 wherein said first PIGLER loop antenna and said second PIGLER loop antenna are coupled via a ground wire.
Claim 4
Dependent Claim
26 words
A cordless communications system according to claim 1 wherein said first PIGLER loop antenna and said second PIGLER loop antenna each have linear impedance matching filters.
Claim 5
Dependent Claim
26 words
A cordless communications system according to claim 2 wherein said first PIGLER loop antenna and said second PIGLER loop antenna each have linear impedance matching filters.
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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) | 1991-05-24 | 1991-11-23 | 1992-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-24 | 1995-11-23 | 1996-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-24 | 1999-11-23 | 2000-05-24 | $7700.00 | Window Closed / Lapsed |