David Campbell

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Ashington, GB

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Patents Grantslast 30 patents

Information Patent Grant
Reaction nut with cam action quick fastening
- Patent number 5,749,691
- Issue date May 12, 1998
- Hedley Purvis Ltd A Company of Great Britain and Northern Ireland
- David Campbell
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Torque wrench
- Patent number 5,249,486
- Issue date Oct 5, 1993
- Hedley Purvis Limited
- Ian C. Thompson
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
Quick-fastening nut
- Patent number 5,032,048
- Issue date Jul 16, 1991
- Hedley Purvis Limited
- John N. Walton
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Hydraulic bolt tensioner
- Patent number 4,998,453
- Issue date Mar 12, 1991
- Hedley Purvis Limited
- John N. Walton
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS