US3296550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency switching device
Assignee: NEC Corp
•
Filing: 1963-09-11
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Granted: 1967-01-03
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Expires: 1983-09-11
Abstract
No abstract record available.
Inventors
- 👤 Hukami Tadasu
- 👤 Tomizawa Tadashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:40
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/50; H03; H03B; H03B5/00; H03B5/30; H03B5/32; H03B5/36; H03B5/366; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/62; H03K17/6257; H03K17/6285; H03K19/00; H03K19/02; H03K19/16; H03K19/162; H03B2200/00; H03B2200/003; H03B2200/0046; H03B2200/0048; H03B2201/00; H03B2201/02; H03B2201/025; H03B2201/0258
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A SELECTIVE FREQUENCY SYSTEM FOR MOBILE RADIO COMMUNICATION, COMPRISING A PLURALITY OF SEPARATE SOURCES OF DIFFERENT RADIO FREQUENCY, MEANS CONNECTING THE OUTPUTS OF SAID SOURCES IN PARALLEL, TO A COMMON OUTPUT TERMINAL, A POWER SUPPLY FOR SAID SOURCES, AND AN ELECTROSNIC SWITCHING DEVICE FOR SELECTIVELY CONNECTING SAID POWER SUPPLY TO A SELECTED ONE OF SAID SOURCES, WHEREBY ONLY SAID ONE SELECTED SOURCE IS EFFECTIVE; DIODE MEANS BEING CONNECTED BETWEEN THE OUTPUTS OF EACH OF SAID SOURCES INTERMEDIATE SAID SOURCES AND SAID COMMON OUTPUT TERMINAL; SAID ELECTRINIC SWITCHING CIRCUIT HAVING A PLURALITY OF OUTPUTS EACH BEING CONNECTED TO ONE OF SAID SOURCES; SAID SWITCHING MEANS INCLUDING MEANS RESPONSIVE TO INCOMING PULSES FOR UNBLOCKING SAID DIODES IN A CONEAT-A-TIME SEQUENTIAL MANNER.
Claim 2
Dependent Claim
119 words
A SELECTIVE FREQUENCY SYSTEM FOR MOBILE RADIO COMMUNICATION, COMPRISING A PLURALITY OF SEPARATE SOURCES OF DIFFERENT RADIO FREQUENCY, MEANS CONNECTING THE OUTPUTS OF SAID SOURCES IN PARALLEL, TO A COMMON OUTPUT TERMINAL, A POWER SUPPLY FOR SAID SOURCES, AND AN ELECTROSNIC SWITCHING DEVICE FOR SELECTIVELY CONNECTING SAID POWER SUPPLY TO A SELECTED ONE OF SAID SOURCES, WHEREBY ONLY SAID ONE SELECTED SOURCE IS EFFECTIVE; DIODE MEANS BEING CONNECTED BETWEEN THE OUTPUTS OF EACH OF SAID SOURCES INTERMEDIATE SAID SOURCES AND SAID COMMON OUTPUT TERMINAL; SAID ELECTRINIC SWITCHING CIRCUIT HAVING A PLURALITY OF OUTPUTS EACH BEING CONNECTED TO ONE OF SAID SOURCES; SAID SWITCHING MEANS INCLUDING MEANS RESPONSIVE TO INCOMING PULSES FOR UNBLOCKING SAID DIODES IN A CONEAT-A-TIME SEQUENTIAL MANNER.
References Cited (Backward Citations)
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US2929874A
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US2840713A
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US3105106A
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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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |