Per Willadsen

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Patents Grantslast 30 patents

Information Patent Grant
Brick press and associated equipment for making bricks
- Patent number 4,164,537
- Issue date Aug 14, 1979
- Frede H. Drostholm
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Brick press and associated equipment for making bricks
- Patent number 4,050,865
- Issue date Sep 27, 1977
- Drostholm; Frede Hilmar
- Frede Hilmar Drostholm
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Brick press and associated equipment for making bricks
- Patent number 4,035,128
- Issue date Jul 12, 1977
- Frede Hilmar Drostholm
- Frede Hilmar Drostholm
- B28 - WORKING CEMENT, CLAY, OR STONE