US3176074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time division multiplex stereophonic sound transmission system
Assignee: US Philips Corp
•
Filing: 1960-03-09
•
Granted: 1965-03-30
•
Expires: 1980-03-09
Abstract
No abstract record available.
Inventors
- 👤 Browne Geoffry D Arcy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:35
CPC Classifications
H; H04; H04H; H04H20/00; H04H20/86; H04H20/88; G; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C11/06007; G11C11/06078
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
108 words
A SYSTEM FOR TRANSMITTING AND RECEIVING TWO IDENTIFIABLE STEREOPHONICALLY RELATED AUDIO SIGNALS COMPRISING: MEANS FOR GENERATING A TIME-INTERLACED PAIR OF FIRST GATING WAVES, MEANS FOR GATING SAID TWO AUDIO SIGNALS ALTERNATELY WITH SAID FIRST GATING WAVES FOR A TIME PERIOD LESS THAN ONEHALF CYCLE OF EACH GATING WAVE THEREBY OBTAINING A CODED WAVE HAVING MINIMA AT A SUBSTANTIALLY UNIFORM LEVEL, MEANS FOR MODIFYING SAID CODED WAVE BY DISPLACING THE LEVEL OF ALTERNATE MINIMA WITH RESPECT TO THE LEVEL OF THE REMAINING MINIMA, THEREBY OBTAINING A COMPLEX WAVEFORM, MEANS FOR TRANSMITTING THE COMPLEX WAVEFORM THUS OBTAINED, MEANS FOR RECEIVING SAID COMPLEX WAVEFORM, MEANS FOR SEPARATING SAID ALTERNATE MINIMA, MEANS
References Cited (Backward Citations)
US2262764A
Cited
US2352634A
Cited
US2725470A
Cited
US2907830A
Cited
US2975234A
Cited
US2999129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |