Inventor · disambiguated record
Derek Hopkinson
Also filed as: HOPKINSON DEREK
3 granted patents·158 citations·filing 1987–1990
75Inventor score
Files withALADDIN ENG & MFG3
Top patents by PatentIndex Score
3 records- 0193US4838306APneumatic locking valve with manual overrideALADDIN ENG & MFG·Filed 1987·Granted Jun 13, 1989·103 cites·1 claims
- 0287US5081904ALocking valve and flow control valve assemblyALADDIN ENG & MFG·Filed 1990·Granted Jan 21, 1992·45 cites·12 claims
- 0342US4838532AFluid operated clamping device including fluid pressure locking meansALADDIN ENG & MFG·Filed 1988·Granted Jun 13, 1989·10 cites·14 claims
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