US3564416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cordless,self-contained microphone transmitter
Assignee: Individual
•
Filing: 1968-03-29
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Granted: 1971-02-16
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Expires: 1988-03-29
Abstract
Abstract A CORDLESS, SELF-CONTAINED, FREQUENCY MODULATED MICROPHONE TRANSMITTER INCLUDING A HOUSING ADAPTED TO BE HAND-HELD, A MICROPHONE PICKUP ELEMENT, AND A CIRCUIT COMPRISING A BATTERY, AN INPUT IMPEDANCE MATCHING AND EQUALIZATION NETWORK, A TRIPLEX COLPITTS RADIO FREQUENCY OSCILLATOR-MODULATOR, AN ANTENNA THAT INCLUDES COMPONENTS OF THE MICROPHONE PICKUP ELEMENT, AND AN ISOLATING BUFFER AMPLIFIER TO COUPLE FREQUENCY MODULATED ENERGY TO THE ANTENNA.
Inventors
- 👤 Edward G Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:34
CPC Classifications
H; H04; H04B; H04B5/00; H04R; H04R1/00; H04R1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |