Patent CH445952A successfully refreshed from Google Patents.
Patent US338248A successfully refreshed from Google Patents.
Patent US2987768A successfully refreshed from Google Patents.
USB262287I5
Expired / Lapsed
US
⏱️ 0.0 years remaining
USB262287I5 - - Google Patents
Assignee: —
•
Filing: 1972-06-13
•
Granted: —
•
Expires: 1992-06-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:14
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/10527; H; H03; H03M; H03M3/00; H03M3/04; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N5/926; H04N5/9261; H04N5/9262
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3319013A
Cited
US3311904A
Cited
US3435135A
Cited
US3388375A
Cited
US3449757A
Cited
US3588836A
Cited
US3573744A
Cited
US3596253A
Cited
US3641503A
Cited
US3700320A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.