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. 03, 2021
Filed:
Feb. 21, 2019
Otis Elevator Company, Farmington, CT (US);
Sven Knuth, Berlin, DE;
OTIS ELEVATOR COMPANY, Farmington, CT (US);
Abstract
A method of updating at least one security certificate of a safety circuit of an elevator system includes: connecting the safety circuit with a communicator which is capable to communicate with a certification server; sending from the communicator to the safety circuit a security certificate update request for updating at least one security certificate stored within the safety circuit; the safety circuit sending a public key of a safety circuit security certificate associated with the safety circuit via the communicator to the certification server; the certification server checking whether the safety circuit security certificate associated with the received public key is included in a data base of known security certificates and not marked as compromised.