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. 17, 2002
Filed:
Mar. 08, 2001
Applicant:
Inventor:
Mikiya Shimizu, Tokyo, JP;
Assignee:
NEC Viewtechnology, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 2/116 ; G03B 2/118 ;
U.S. Cl.
CPC ...
G03B 2/116 ; G03B 2/118 ;
Abstract
A lamp house prevents danger when a lamp bulb, acting as a light source in a housing, breaks. The lamp house includes, at inlet and outlet vents for cooling the lamp bulb, movable plates which are movable only toward the inside of the housing of the lamp house. Springs for closing the movable plates are provided and a sensor for detecting opening and closing states of one of the movable plates is disposed on the side of the inlet vent.
Shimizu, Mikiya. (2002). Lamp house and projector device thereof (U.S. Patent No. 6494581). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6494581
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile