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US3508136A
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Apparatus for obtaining a carrier frequency shifting at a constant phase angle in frequency modulation
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1967-10-12
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Granted: 1970-04-21
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Expires: 1987-10-12
Abstract
No abstract record available.
Inventors
- 👤 Sigurd Pareli Danielsen
- 👤 Jan-Erik Hagen
- 👤 Walter Herbert Erwin Widl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:37
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10; H04L27/12
Claims Analysis
Total Claims: 0
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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) | 1973-04-20 | 1973-10-20 | 1974-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-20 | 1977-10-20 | 1978-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-20 | 1981-10-20 | 1982-04-21 | $7700.00 | Window Closed / Lapsed |