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. 25, 2010
Filed:
Jun. 04, 2008
Applicants:
Tsutomu Sasaki, Hamamatsu, JP;
Yuji Fujiwara, Hamamatsu, JP;
Inventors:
Tsutomu Sasaki, Hamamatsu, JP;
Yuji Fujiwara, Hamamatsu, JP;
Assignee:
Yamaha Corporation, Shizuoka-Ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09B 15/04 (2006.01); G10H 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An electronic proof system is provided in association with an automatic player piano; while a human player is practicing a music tune on the acoustic piano, the electronic proof system monitors the pedals of piano to see whether or not the player brings the pedals to target pedal positions; if the current pedal position is spaced from the target pedal position, the electronic proof system gives rise to fine vibrations of the pedal, and makes the player notice the pedal staying at incorrect pedal position through the tactile impression.