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:
Aug. 28, 2012
Filed:
Jul. 11, 2008
Scott Gregory Holm-hansen, Plymouth, MN (US);
Dirk Willy Bauschke, Shakopee, MN (US);
Scott Andrew Johansen, Richfield, MN (US);
Khoi Minh Nguyen, Eden Praire, MN (US);
Scott Gregory Holm-Hansen, Plymouth, MN (US);
Dirk Willy Bauschke, Shakopee, MN (US);
Scott Andrew Johansen, Richfield, MN (US);
Khoi Minh Nguyen, Eden Praire, MN (US);
Rosemount Inc., Chanhassen, MN (US);
Abstract
Field devices used to measure process parameters can also function as a data historian by storing process data and associated time stamps. In response to a request for stored process data, the field device uses a cipher and a secret method to generate an encrypted validation string that is provided along with unencrypted information including the process data and time stamps. A validation service that maintains a secure database of field devices and their associated ciphers and secret methods can validate the unencrypted information by using the validation string.