Drostholm; Frede Hilmar

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Patents Grantslast 30 patents

Information Patent Grant
Method for making tubular resin elements such as pipes
- Patent number 4,081,302
- Issue date Mar 28, 1978
- Drostholm; Frede Hilmar
- Frede Hilmar Drostholm
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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
Equipment for cleaning solvents
- Patent number 4,022,669
- Issue date May 10, 1977
- Drostholm; Frede Hilmar
- Frede Hilmar Drostholm
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Method and apparatus for making tubular resin elements such as pipes
- Patent number 4,011,354
- Issue date Mar 8, 1977
- Drostholm; Frede Hilmar
- Frede Hilmar Drostholm
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL