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:
Jul. 03, 1984
Filed:
Dec. 14, 1982
Applicant:
Inventors:
Shigeru Kuriyama, Katsuta, JP;
Minoru Kaminaga, Katsuta, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318341 ; 3183 / ; 3183 / ;
Abstract
A transistor control device in a power transistor chopper is arranged to charge a capacitor for feeding a base current to the chopper transistor with electrical energy stored in an impedance of a wiring connecting a DC power source to a load to which the load current is supplied from the DC power source through the chopper.
Kuriyama, Shigeru. (1984). Transistor control device for power transistor chopper (U.S. Patent No. 4458186). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4458186
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile