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:
Feb. 21, 1978
Filed:
Jul. 14, 1976
Applicant:
Inventors:
Yoshio Tatsumi, Tokyo, JA;
Tooru Kadowaki, Tokyo, JA;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
G04B / ;
U.S. Cl.
CPC ...
5814 / ; 58 59 ; 58138 ; 58139 ;
Abstract
In the gear train of a wrist watch a jewel mounted on the lower side of a gear wheel connected to the second hand engages the enlarged upper end of the center pipe. The friction factor between the gear wheel and the center pipe is thereby reduced and the performance of the watch is improved.