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. 15, 1979
Filed:
Oct. 03, 1977
Applicant:
Inventors:
Tsuguo Fukuda, Yokohama, JP;
Hitoshi Hirano, Kanagawa, JP;
Assignee:
Tokyo Shibaura Electric Co., Ltd., Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B24B / ;
U.S. Cl.
CPC ...
5128 / ;
Abstract
A method for preparing oxide piezoelectric material wafers from a rhombohedral single crystal of an oxide piezoelectric material as-grown cylindrically in the X-axis direction includes linearly rubbing-off at least one side portion of such as-grown cylindrical single crystal facing to a specified direction along the longitudinal direction of such single crystal before cutting X-cut wafers from such single crystal thereby to provide a corresponding flat portion.