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US3046337A Expired / Lapsed US ⏱️ 0.0 years remaining

Stereophonic sound

Assignee: HAMNER ELECTRONICS Co Inc
•
Filing: 1957-08-05
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Granted: 1962-07-24
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Expires: 1977-08-05
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Abstract

No abstract record available.

Inventors

  • 👤 William F Hornyak

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 20:27
CPC Classifications
H; H04; H04S; H04S3/00

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

GB313022A Cited
US2273866A Cited
US2179840A Cited
US2352696A Cited
US2340365A Cited
US2520798A Cited
US2403232A Cited
US2616970A Cited
US2517819A Cited
USRE24670E Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1965-07-23 1966-01-22 1966-07-24 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1969-07-23 1970-01-22 1970-07-24 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1973-07-23 1974-01-22 1974-07-24 $7700.00 Window Closed / Lapsed

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