Patent FR1169701A successfully refreshed from Google Patents.
FR1169701A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Electromagnetic device, especially for microphones and headphones
Assignee: CT D ETUDES ET DE DEV de l ELE
•
Filing: 1957-03-15
•
Granted: 1959-01-05
•
Expires: 1977-03-15
Abstract
No abstract record available.
Inventors
- 👤 Jacques-Marie-Noel Hanlet
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-03 17:21
CPC Classifications
H; H04; H04R; H04R9/00; H04R9/02; H04R9/025; H04R9/04; H04R9/046; H04R9/047; H04R9/06
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.