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. 20, 1990
Filed:
May. 04, 1989
Applicant:
Inventor:
Shinji Hamanaga, Shizuoka, JP;
Assignee:
Yamaha Corporation, Hamamatsu, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10D / ;
U.S. Cl.
CPC ...
84390 ; 84392 ;
Abstract
A rotary valve assembly incorporated in a brass instrument for changing a pitch of a tone comprises a rotary valve housed in a valve casing having two groups of aeroports, and the rotary valve is provided with two air passages, one of which interconnects the aeroports in the first group and the other of which interconnects one aeroport of the first group and one aeroport of the second group, so that various arrangements are possible for the aeroports.
Hamanaga, Shinji. (1990). Structure of rotary valve assembly used in wind instrument (U.S. Patent No. 4970932). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4970932
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile