The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 28, 1976
Filed:
Mar. 12, 1973
Applicant:
Inventors:
Ellwood S Douglas, Orinda, CA (US);
Richard C Doyle, Orinda, CA (US);
David William Nestor, Oroville, CA (US);
Wallace W Wahlgren, Oakland, CA (US);
Assignee:
3-M Company, St. Paul, MN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
317 / ; 317 58 ; 317 / ; 335 18 ;
Abstract
Electric circuit breaker including highly sensitive ground fault responsive means for protecting human life from electrical shock. The circuit breaker is suitable for mounting in a panelboard at the service entrance of a building to provide ground fault protection for the individual branch circuits in the building.