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:
Apr. 06, 1976
Filed:
Aug. 28, 1974
Satoshi Ichioka, Toda, JA;
Shinjiro Takeuchi, Toda, JA;
Tadashi Inoue, Tokyo, JA;
Tomokazu Katsuragawa, Toda, JA;
Mishima Kosan Co., Ltd., Kitakyushu, JA;
Abstract
A portable device for generating and tuning a whole tone scale comprising means for generating a signal having a frequency of a reference tone scale, first means for shaping an output of the signal generating means and means for converting the output of the first shaping means. The device further includes means for converting the audible tone of a musical instrument to be tuned into a train of electrical signals, means for frequency multiplying and dividing input signals, second means for shaping the output of the converting means, logic means for logically comparing the outputs of the first and the second shaping means to generate a train of signals each having a width corresponding to the frequency difference between the outputs of the first and the second shaping means, and means for indicating the output of the logic means.