applying fluid pressure or vacuum to the material

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for manufacturing bell and spigot pipe moldings
- Patent number 6,004,126
- Issue date Dec 21, 1999
- Klaus Strobel
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Method for manufacturing ceramic bell and spigot pipe moldings
- Patent number 5,779,966
- Issue date Jul 14, 1998
- Klaus Strobel
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
2671940
- Patent number 2,671,940
- Issue date Mar 16, 1954
- B28 - WORKING CEMENT, CLAY, OR STONE