Derek Firth

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Coeur d'Alene, ID, US

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Patents Grantslast 30 patents

Information Patent Grant
Road transportable segmental concrete railroad tie long-line produc...
- Patent number 6,059,199
- Issue date May 9, 2000
- CXT, Incorporated
- Anders L. U. Eriksson
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Road transportable segmental concrete railroad tie long-line produc...
- Patent number 5,766,648
- Issue date Jun 16, 1998
- CXT Incorporated
- Anders L. U. Eriksson
- B28 - WORKING CEMENT, CLAY, OR STONE