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:
May. 16, 1978
Filed:
Nov. 08, 1976
Applicant:
Inventor:
Makoto Kuboshima, Tokyo, JA;
Assignee:
Fuji Photo Film Co., Ltd., Minami-ashigara, JA;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B03B / ;
U.S. Cl.
CPC ...
353 70 ; 353D / ;
Abstract
In an over-head projector or a slide projector, a positive or negative lens is provided immediately in front of a transparency in the projector. The lens is normally perpendicular to the optical axis of the projection lens, and is inclined to an oblique angle with respect to the optical axis when the image projected on a projection screen is distorted owing to oblique projection of the image on the screen.