Patent US3131351A successfully refreshed from Google Patents.
US3131351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Outdoor theater sound system comprising a plurality of transmitters coupled to a single distribution wire
Assignee: Individual
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Filing: 1961-03-29
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Granted: 1964-04-28
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Expires: 1981-03-29
Abstract
No abstract record available.
Inventors
- 👤 Richard P Herzfeld
- 👤 Gordon L Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:42
CPC Classifications
H; H04; H04R; H04R27/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
IN A SOUND SYSTEM FOR AN OUTDOOR THEATER HAVING A PARKING AND VIEWING AREA, AUDIO MEANS INCLUDING A MOTION PICTURE PROJECTOR FOR PRODUCING AN AUDIO SIGNAL, CONDUCTOR MEANS FOR TRANSMITTING SAID AUDIO SIGNAL CONNECTED TO SAID AUDIO MEANS AND EXTENDING TO THE PARKING AND VIEWING AREA OF THE OUTDOOR THEATER, AND A PLURALITY OF RADIO FREQUENCY OSCILLATORS MOUNTED IN THE VIEWING AREA AND CONNECTED TO SAID CONDUCTOR MEANS, SAID RADIO FREQUENCY OSCILLATORS ADAPTED TO PRODUCE A RADIO SIGNAL MODULATED BY SAID AUDIO SIGNAL AND TO RADIATE SAID RADIO SIGNAL ONLY IN THE IMMEDIATE VICINITY OF SAID OSCILLATORS FOR RECEPTION BY RADIOS IN AUTOMOBILES PARKED IN THE IMMEDIATE VICINITY OF SAID OSCILLATORS.
Claim 2
Dependent Claim
111 words
IN A SOUND SYSTEM FOR AN OUTDOOR THEATER HAVING A PARKING AND VIEWING AREA, AUDIO MEANS INCLUDING A MOTION PICTURE PROJECTOR FOR PRODUCING AN AUDIO SIGNAL, CONDUCTOR MEANS FOR TRANSMITTING SAID AUDIO SIGNAL CONNECTED TO SAID AUDIO MEANS AND EXTENDING TO THE PARKING AND VIEWING AREA OF THE OUTDOOR THEATER, AND A PLURALITY OF RADIO FREQUENCY OSCILLATORS MOUNTED IN THE VIEWING AREA AND CONNECTED TO SAID CONDUCTOR MEANS, SAID RADIO FREQUENCY OSCILLATORS ADAPTED TO PRODUCE A RADIO SIGNAL MODULATED BY SAID AUDIO SIGNAL AND TO RADIATE SAID RADIO SIGNAL ONLY IN THE IMMEDIATE VICINITY OF SAID OSCILLATORS FOR RECEPTION BY RADIOS IN AUTOMOBILES PARKED IN THE IMMEDIATE VICINITY OF SAID OSCILLATORS.
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) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |