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:
Jul. 08, 1980
Filed:
Nov. 07, 1978
Shigeru Kusunoki, Yamatokoriyama, JP;
Junzo Tanaka, Fujiidera, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
A high requency heating apparatus including a door assembly having a high frequency energy shielding member and a plurality of glass plate members disposed in front and on the outer side of the shielding member. The distances between the shielding member and plurality of glass plate members are such that a composite-impedance Z.sub.T made up of the impedance of the shielding member, the impedance of the glass plate members and the impedance of the space around the heating apparatus becomes approximately equal to or smaller than the composite impedance Z.sub.s made up of the impedance of the shielding member and the impedance of the external space in the absence of the glass plate member for reducing microwave leakage at the front portion of the door assembly.