Robert G. Derrick

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Buffalo, NY, US

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Patents Grantslast 30 patents

Information Patent Grant
Vibratory screening machine with tiltable screen frame and adjustab...
- Patent number 4,882,054
- Issue date Nov 21, 1989
- Derrick Manufacturing Corporation
- William W. Derrick
- B07 - SEPARATING SOLIDS FROM SOLIDS SORTING
Information Patent Grant
Non-clogging wear-reducing screen assembly for vibrating screening...
- Patent number 4,575,421
- Issue date Mar 11, 1986
- Derrick Manufacturing Corporation
- James W. Derrick
- B07 - SEPARATING SOLIDS FROM SOLIDS SORTING
Information Patent Grant
Screen assembly and dewatering technique
- Patent number 3,970,549
- Issue date Jul 20, 1976
- Linatex Corporation of America
- Robert E. Ennis
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL