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:
Apr. 20, 2021
Filed:
Oct. 21, 2015
Hitachi, Ltd., Tokyo, JP;
Yasuhiko Tada, Tokyo, JP;
Masahiro Kawasaki, Tokyo, JP;
Kohhei Aida, Tokyo, JP;
Hiroshi Sasaki, Tokyo, JP;
Toyotaka Yuasa, Tokyo, JP;
Hiroyuki Kagawa, Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
The present invention addresses the problem of providing a temperature sensing body capable of sensing both a temperature increase and a temperature decrease, and having an anti-tampering function. In order to solve said problem, this temperature sensing body is characterized by including: a first ink in which a temperature Tfor initiating color disappearance when the temperature rises and a temperature Tfor initiating color development when the temperature falls are different; and a second ink in which a temperature Tfor initiating color disappearance when the temperature rises and a temperature Tfor initiating color development when the temperature falls are different, wherein the temperature Tfor initiating color disappearance, the temperature Tfor initiating color development, the temperature Tfor initiating color disappearance, and the temperature Tfor initiating color development have the relationship, T<T<T<T.