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:
Jun. 02, 1981
Filed:
Sep. 10, 1979
Kazuhiko Sekiguchi, Tokyo, JP;
Zebra Co., Ltd., Tokyo, JP;
Abstract
A composite writing instrument having a lower tubular casing accommodating therewithin two retractable mechanical pencil units spaced by about 180.degree.. An upper tubular casing encloses a cam mechanism for effecting a reciprocal rotational motion through about 180.degree. around the axis of the instrument and engaging both pencil units for alternately shifting them in the axial direction whereby the two pencil units can be alternately advanced to a writing position through an opening at the lower end of the lower tubular casing, or retracted to a retracted position within the lower tubular casing. A feeding operation for advancing the lead of the pencil unit in the writing position is effected by reciprocating of the upper tubular casing in the axial direction.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile