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:
Sep. 24, 1985
Filed:
Aug. 30, 1983
Applicant:
Inventors:
Shoichi Minagawa, Tokyo, JP;
Takeshi Okamoto, Tokyo, JP;
Assignee:
Clarion Co., Ltd., Tokyo, JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
330-55 ; 330-46 ;
Abstract
The parametric amplifier includes plurality of parameter changing or exciting regions provided in a periodic array on a wave propagation medium having the property that waves having different frequencies travel through the medium at different velocities, so as to cause a parametric action only when a wave applied to the amplifier satisfies a predetermined condition relative to the dispersive nature of the medium.