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. 19, 1981
Filed:
Sep. 10, 1979
Kazuhiko Sekiguchi, Tokyo, JP;
Zebra Co., Ltd., Tokyo, JP;
Abstract
A composite writing instrument composed of two writing units such as two ball point and pen units which has a lower tubular casing accommodating therewithin two writing units and an upper tubular casing accommodating a cam mechanism therewithin which is rotatable about the axis of the casing for advancing the two writing units to a writing position through an opening at the tip of the lower tubular casing or for retracting the units to a holding position within the lower tubular casing. The cam mechanism is rotatable around the axis of the lower tubular casing as well as being engageable with both of the two writing units respectively for shifting the writing units in the axial direction, and the mechanism includes a guide casing having lengthwise grooves thereon and a curved casing accommodating the guide casing therewithin.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile