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:
Nov. 13, 1984
Filed:
Mar. 21, 1983
Applicant:
Inventors:
Hironobu Kato, Urawa, JP;
Masaru Ichikawa, Yokohama, JP;
Atsushi Sano, Yokohama, JP;
Yoshiaki Tanabe, Kawasaki, JP;
Yoshiyuki Nakano, Tokyo, JP;
Assignee:
Nippon Kogaku K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354246 ; 354270 ;
Abstract
A planar light-intercepting blade adapted to be moved in the direction of surface thereof at a position across the optical path of an optical device to thereby control the quantity of light passing through the optical path comprises a pair of outer layers forming the outer surfaces of the blade, and an inner layer formed between the outer layers and having a number of spaces therein.