Perma-Post International, Inc.

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Bellingham, WA, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for making sleeve encased concrete posts
- Patent number 5,229,051
- Issue date Jul 20, 1993
- Perma-Post International, Inc.
- Melvin D. Martin
- B28 - WORKING CEMENT, CLAY, OR STONE