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. 13, 2016
Filed:
Apr. 22, 2010
Allan G. Ferry, Windsor, CT (US);
Allan G. Ferry, Windsor, CT (US);
GENERAL ELECTRIC TECHNOLOGY GMBH, Baden, CH;
Abstract
This method securely transmits data from a secure control system [] located on an isolated computer network [] to a separate computer [] outside the isolated control network []. The method includes several features designed to minimize the risk of outside cyber attack on the control system [] while ensuring that the data is transmitted correctly and promptly. The system uses a non-routable unidirectional physical data link []. Messages [] are redundantly transmitted to computer [] without acknowledgement along with checksums []. The checksum information is used to validate that the message header [] and the message data [] have been received correctly. Redundant information contained in repeated message data blocks [] is discarded after the transmitted message [] is correctly received and decoded. An ordered transmission sequence is used to minimize the message delay if an individual message [] was not received correctly on its first transmission.