Patent US2771550A successfully refreshed from Google Patents.
US3370236A
Expired / Lapsed
US
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Radio equipment with chest mounted speaker-microphone assembly
Assignee: Motorola Solutions Inc
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Filing: 1967-01-30
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Granted: 1968-02-20
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Expires: 1987-01-30
Abstract
No abstract record available.
Inventors
- 👤 Robert H Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:32
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/3827; H04B1/385; H04B2001/3855; Y; Y10; Y10S; Y10S224/00; Y10S224/929; Y10S224/93
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2439411A
Cited
US2541042A
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US2571514A
Cited
US2685224A
Cited
US3087117A
Cited
US3114105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |