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:
Apr. 18, 1989
Filed:
Nov. 26, 1986
Applicant:
Inventor:
Hironori Takase, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350252 ; 350255 ; 350320 ; 264242 ;
Abstract
A lens tube unit composed of an intermediate tube composed of metal or resin and provided with a helicoid or helicoids on the internal periphery and/or external periphery; and an inner tube and an outer tube fitted with or screwed in the internal and external peripheries of the intermediate tube and provided with a fitting portion or helicoid; and the outer and/or inner tube is molded as a sandwich structure consisting of a central core resin layer and skin resin layers.
Takase, Hironori. (1989). Lens tube unit and method for producing the same (U.S. Patent No. 4822138). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4822138
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile