Robert Donovan

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Edmonton, CA

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Patents Grantslast 30 patents

Information Patent Grant
Systems and methods for rail worker and rail vehicle warning and po...
- Patent number 11,059,503
- Issue date Jul 13, 2021
- Douglas Grant Fisher
- G08 - SIGNALLING

Patents Applicationslast 30 patents

Information Patent Application
SYSTEMS AND METHODS FOR RAIL WORKER AND RAIL VEHICLE WARNING AND PO...
- Publication number 20210309268
- Publication date Oct 7, 2021
- Willowglen Systems Inc.
- Douglas Grant Fisher
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
SYSTEMS AND METHODS FOR RAIL WORKER AND RAIL VEHICLE WARNING AND PO...
- Publication number 20210155275
- Publication date May 27, 2021
- Willowglen Systems Inc.
- Douglas Grant Fisher
- B61 - RAILWAYS