Patent JPS548522A successfully refreshed from Google Patents.
JPS548522A
Expired / Lapsed
JP
⏱️ 0.0 years remaining
Electromagnetic controller of cameras
Assignee: Canon Inc
•
Filing: 1977-06-21
•
Granted: —
•
Expires: 1997-06-21
Abstract
Abstract PURPOSE: To perfectly prevent the entry of dust into dustproof case by disposing a permanent magnet to the circumference of the take-out port at one end of the signal member of the dustproof case which contains an electromagnet, its suction member and the signal member operating cooperatively with this, and hermetically sealing the spacing thereof with magnetic fluid. COPYRIGHT: (C)1979,JPO&Japio
Inventors
- 👤 Hideaki Miyagawa
- 👤 Ryoichi Ida
Bibliographic Details
Application Number
—
Jurisdiction
JP
Data Source
google_patents
Last Synchronized
2026-11-02 10:02
CPC Classifications
—
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.