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:
Dec. 31, 2019
Filed:
Apr. 27, 2017
Fujitsu Technology Solutions Intellectual Property Gmbh, München, DE;
Christoph König, München, DE;
Fujitsu Technology Solutions Intellectual Property GmbH, München, DE;
Abstract
A method securely opens a door connected to a system and includes a central unit, a mobile terminal, a local control unit and a door opening device that are configured to transmit data. The method includes transmitting a first key to the mobile terminal by the central unit; transmitting the first key to the control unit by the mobile terminal via the door opening device; generating a second key by the control unit depending on the first key; transmitting the second key from the control unit to the mobile terminal via the door opening device; generating a third key by the mobile terminal depending on the second key; transmitting the third key to the central unit by the mobile terminal via the door opening device; and controlling opening of the door depending on the third key by the central unit by transmitting a request to the door opening device.