Donald L. Crothers

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Rocklin, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for transferring a barrier
- Patent number 8,348,546
- Issue date Jan 8, 2013
- Energy Absorption Systems, Inc.
- James B. Welch
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Barrier transfer device, system and method for the use thereof
- Patent number 8,109,692
- Issue date Feb 7, 2012
- Energy Absorption Systems, Inc.
- James B. Welch
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES

Patents Applicationslast 30 patents

Information Patent Application
METHOD FOR TRANSFERRING A BARRIER
- Publication number 20120128418
- Publication date May 24, 2012
- Energy Absorption Systems, Inc.
- James B. Welch
- B66 - HOISTING LIFTING HAULING
Information Patent Application
Barrier transfer device, system and method for the use thereof
- Publication number 20090074507
- Publication date Mar 19, 2009
- Energy Absorption Systems, Inc.
- James B. Welch
- B66 - HOISTING LIFTING HAULING