FR67153E
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Amplifier devices using semiconductors or crystals
Assignee: International Standard Electric Corp
•
Filing: 1954-07-22
•
Granted: 1957-11-25
•
Expires: 1974-07-22
Abstract
No abstract record available.
Inventors
- 👤 Cyril Francis Drake
- 👤 Robert Anthony Hyman
- 👤 Frederick Charles Geary
- 👤 Simon Ernst Mayer
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-23 14:55
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/313; C; C30; C30B; C30B31/00; C30B31/02; G; G01; G01R; G01R31/00; G01R31/26; H10; H10D; H10D1/00; H10D1/40; H10D62/00; H10D62/10; H10D64/00; H10D64/20; H10D64/23; H10D99/00; H10P; H10P10/00; H10P32/00; H10P50/00; H10P50/69; H10P50/691; H10P95/00; H10P95/50; H10P95/80
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.