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US2476141A Expired / Lapsed US ⏱️ 0.0 years remaining

Frequency shift keyer

Assignee: RCA Corp
•
Filing: 1946-08-21
•
Granted: 1949-07-12
•
Expires: 1966-08-21
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Abstract

No abstract record available.

Inventors

  • 👤 Goddard De Witt Rugg

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 02:33
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10; H04L27/12

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

US1993395A Cited
US2173145A Cited
US2264608A Cited
US2276008A Cited
US2344813A Cited
US2291369A Cited
US2406932A Cited
US2401604A Cited
US2400648A Cited
US2421727A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1952-07-11 1953-01-10 1953-07-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1956-07-11 1957-01-10 1957-07-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1960-07-11 1961-01-10 1961-07-12 $7700.00 Window Closed / Lapsed

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