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:
Nov. 18, 1997
Filed:
Sep. 30, 1996
Haruo Matsushima, Yamatokoriyama, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A highly reliable, accurate humidity measuring device which detects differences in humidity between datum air and measuring air as a time or a phase difference in the propagation velocity of sonic waves, using sonic wave generating and receiving means, and processes this difference using circuitry to provide the humidity condition in the air being tested. Also an oven or heating cooker is disclosed equipped with the humidity measuring device so that it can detect the cooking condition of food by measuring temperature changes due to the steam generated from the food and then using the humidity measuring device to determine when to shut off the heat source of the oven.