Patent CH74488A successfully refreshed from Google Patents.
CH74488A
Expired / Lapsed
CH
⏱️ 0.0 years remaining
Protective device for hearing organs against explosions
Assignee: Oscar Zoellner
•
Filing: 1916-06-24
•
Granted: —
•
Expires: 1936-06-24
Abstract
No abstract record available.
Inventors
- 👤 Oscar Zoellner
Bibliographic Details
Application Number
—
Jurisdiction
CH
Data Source
google_patents
Last Synchronized
2026-11-02 03:58
CPC Classifications
A; A61; A61F; A61F11/00; A61F11/06; A61F11/08
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.