Derek Hopkinson

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Menomonee Falls, WI, US

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Patents Grantslast 30 patents

Information Patent Grant
Locking valve and flow control valve assembly
- Patent number 5,081,904
- Issue date Jan 21, 1992
- Aladdin Engineering & Mfg., Inc.
- Edward R. Horn
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Pneumatic locking valve with manual override
- Patent number 4,838,306
- Issue date Jun 13, 1989
- Aladdin Engineering & Mfg., Inc.
- Edward R. Horn
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Fluid operated clamping device including fluid pressure locking means
- Patent number 4,838,532
- Issue date Jun 13, 1989
- Aladdin Engineering & Mfg., Inc.
- Edward R. Horn
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS