Patent US4255897A successfully refreshed from Google Patents.
Patent US2545259A successfully refreshed from Google Patents.
US2545259A
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Multiple radio heterodyne distribution system
Assignee: MONMOUTH LAB Inc
•
Filing: 1946-10-05
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Granted: 1951-03-13
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Expires: 1966-10-05
Abstract
No abstract record available.
Inventors
- 👤 Cassell Joseph Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:05
CPC Classifications
H; H04; H04H; H04H20/00; H04H20/65; H04H20/76; H04H20/84
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1687061A
Cited
US1455827A
Cited
US1682000A
Cited
US1754878A
Cited
US1853678A
Cited
US1840013A
Cited
US2008279A
Cited
US2073034A
Cited
AT147004B
Cited
US2151884A
Cited
US2151814A
Cited
US2117638A
Cited
US2142874A
Cited
US2188508A
Cited
US2205469A
Cited
US2189287A
Cited
US2268812A
Cited
US2454814A
Cited
US2400857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |