US3103557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Serotta
Assignee: —
•
Filing: —
•
Granted: 1963-09-10
•
Expires: 1980-09-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:41
CPC Classifications
H; H04; H04M; H04M9/00; H04M9/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
AN INTERCOMMUNICATIONS SYSTEM COMPRISING A PLURALITY OF STATIONS, EACH OF SAID STATIONS INCLUDING A SINGLE TRANSDUCER FOR EFFECTING BOTH VOICE TRANSMISSION AND RECEPTION, A MULTIPLE CONDUCTOR CABLE HAVING A PLURALITY OF BUS WIRES, SAID CABLE BEING PASSED SERIALLY TO EACH OF SAID STATIONS, SAID CABLE INCLUDING A CALLING STATION BUS WIRE COMMON TO ALL SATIONS, A SEPARATE SELECTED STATION BUS WIRE FOR EACH OF SAID STATIONS AND A COMMON SELECTED STATION BUS WIRE, AN AMPLIFIER HAVING AN INPUT AND AN OUTPUT, FIRST AND SECOND AMPLIFIER LEADS COUPLED TO SAID CALLING STATION BUS WIRE AND SAID COMMON SELECTED STATION BUS WIRE RESPECTIVELY, RELAY MEANS CONNECTING SAID FIRST AND SECOND AMPLIFIER LEADS TO THE OUTPUT AND INPUT OF SAID AMPLIFIER RESPECTIVELY WHEN SAID REALY IS IN ITS NORMAL STATE AND FOR REVERSING THE CONNECTION OF SAID LEADS WHEN SAID RELAY IS IN ANOTHER STATE, A FIRST SWITCH MEANS AT EACH
Claim 2
Dependent Claim
148 words
AN INTERCOMMUNICATIONS SYSTEM COMPRISING A PLURALITY OF STATIONS, EACH OF SAID STATIONS INCLUDING A SINGLE TRANSDUCER FOR EFFECTING BOTH VOICE TRANSMISSION AND RECEPTION, A MULTIPLE CONDUCTOR CABLE HAVING A PLURALITY OF BUS WIRES, SAID CABLE BEING PASSED SERIALLY TO EACH OF SAID STATIONS, SAID CABLE INCLUDING A CALLING STATION BUS WIRE COMMON TO ALL SATIONS, A SEPARATE SELECTED STATION BUS WIRE FOR EACH OF SAID STATIONS AND A COMMON SELECTED STATION BUS WIRE, AN AMPLIFIER HAVING AN INPUT AND AN OUTPUT, FIRST AND SECOND AMPLIFIER LEADS COUPLED TO SAID CALLING STATION BUS WIRE AND SAID COMMON SELECTED STATION BUS WIRE RESPECTIVELY, RELAY MEANS CONNECTING SAID FIRST AND SECOND AMPLIFIER LEADS TO THE OUTPUT AND INPUT OF SAID AMPLIFIER RESPECTIVELY WHEN SAID REALY IS IN ITS NORMAL STATE AND FOR REVERSING THE CONNECTION OF SAID LEADS WHEN SAID RELAY IS IN ANOTHER STATE, A FIRST SWITCH MEANS AT EACH
References Cited (Backward Citations)
US2536820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-09 | 1967-03-11 | 1967-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-09 | 1971-03-11 | 1971-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-09 | 1975-03-11 | 1975-09-10 | $7700.00 | Window Closed / Lapsed |