CH218686A
Expired / Lapsed
CH
⏱️ 0.0 years remaining
Method for showing slides by means of a projection apparatus and device for carrying out this method.
Assignee: Frueh Hans
•
Filing: 1941-03-13
•
Granted: —
•
Expires: 1961-03-13
Abstract
No abstract record available.
Inventors
- 👤 Frueh Hans
Bibliographic Details
Application Number
—
Jurisdiction
CH
Data Source
google_patents
Last Synchronized
2026-10-25 23:48
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/02; G03B23/04; G03B23/042
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.