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:
Feb. 18, 2003
Filed:
Mar. 30, 2000
Applicant:
Inventor:
Hiroyasu Torazawa, Tokyo, JP;
Assignee:
Oki Electric Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 3/00 ;
U.S. Cl.
CPC ...
H02H 3/00 ;
Abstract
A photocoupler ( ) includes a light emitting unit ( ) which emits an input light (P); a first path ( ) connecting a first terminal ( ) and a second terminal ( ); a switching circuit ( ) provided in the first path ( ) to open and close the first path ( ) in response to the input light (P); and a circuit breaker ( ) provided in the first path ( ) to disconnect the first path ( ) in response to over current (excess current).