CH474200A
Expired / Lapsed
CH
⏱️ 0.0 years remaining
Head hearing aid
Assignee: Elektro Akustik Ag F
•
Filing: 1969-01-17
•
Granted: —
•
Expires: 1989-01-17
Abstract
No abstract record available.
Inventors
- 👤 Diethelm Beda
Bibliographic Details
Application Number
—
Jurisdiction
CH
Data Source
google_patents
Last Synchronized
2026-11-03 11:34
CPC Classifications
H; H03; H03G; H03G5/00; H03G5/02; H03G5/04; H03G5/10; H03G5/12; H04; H04R; H04R25/00; H04R25/50; H04R25/502; H04R25/60; H04R25/603; H04R2225/00; H04R2225/61; H04R25/70
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.