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:
Jun. 11, 1991
Filed:
May. 03, 1989
Kazuhiko Ito, Hirakata, JP;
Kouji Miyazaki, Yawata, JP;
Masakatsu Kichibayashi, Sakaide, JP;
Shigeru Horii, Takatsuki, JP;
Masataka Ozawa, Takarazuka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A discharge lamp apparatus is capable of securely detecting the decrease of emission in the terminal stage of the life of a discharge lamp by connecting a voltage detecting circuit to the discharge lamp, and a discharge lamp apparatus for securely starting, operating and dimming the discharge lamp, and is also capable of protecting the lamp in the event of abnormality; the apparatus includes two timer circuits, a reset circuit, a dimmer circuit, an abnormality detecting circuit, and a stopping circuit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile