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. 12, 1985
Filed:
Aug. 25, 1982
Sadaaki Ezawa, Iwata, JP;
Abstract
An electronic musical instrument in which a pair of frequency numbers consisting of a note frequency number corresponding to the pitch of each note and an auxiliary frequency number slightly different from the note frequency number are provided for each note. Only when it is detected that keys of the same note are simultaneously depressed on at least two keyboards, musical waveform signals of slightly different pitches are produced. When keys of different notes are depressed on the individual keyboards, musical sounds of standard pitches can be produced, and only when keys of the same note are concurrently depressed on the individual keyboards, the slightly different frequency numbers are selected, by which variations in the volume of the composite musical sound can be made unnoticeable.