Douglas F. Silk

Follow

Person

Whitby, CA

People

Patents Grantslast 30 patents

Information Patent Grant
Apparatus for the splitting of cast concrete dual blocks
- Patent number 6,565,062
- Issue date May 20, 2003
- Hengestone Holdings, Inc.
- Terry P. Steeves
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Process and apparatus for the splitting of cast concrete dual blocks
- Patent number 6,226,954
- Issue date May 8, 2001
- Hengestone Holdings Inc.
- Terry P. Steeves
- B28 - WORKING CEMENT, CLAY, OR STONE

Patents Applicationslast 30 patents

Information Patent Application
Process and apparatus for the splitting of cast concrete dual blocks
- Publication number 20010034980
- Publication date Nov 1, 2001
- Terry P. Steeves
- G06 - COMPUTING CALCULATING COUNTING