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. 29, 1977
Filed:
Sep. 03, 1976
Applicant:
Inventors:
Walter R Linke, Chicago, IL (US);
Andor A Fleischman, Northbrook, IL (US);
Assignee:
Bell & Howell Company, Chicago, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
350189 ; 3501 / ; 350202 ;
Abstract
A lens system primarily for a copier is a reflex, plastic and glass lens design enabling lower manufacturing costs with a higher degree of optical correction than a comparable all glass straight through design of similar optical characteristics. In the preferred embodiment, selected of the plastic elements is formed with aspheric surfaces.