Inventor · disambiguated record
Derek Mark Essam
Also filed as: ESSAM DEREK MARK
3 granted patents·95 citations·filing 1995–2002
75Inventor score
Top patents by PatentIndex Score
3 records- 0180US6920409B2Apparatus for testing operation of an emergency valveDRALLIM LTD·Filed 2002·Granted Jul 19, 2005·26 cites·17 claims
- 0269US6089269APartially stroking an emergency valveDRALLIM LTD·Filed 1999·Granted Jul 18, 2000·33 cites·9 claims
- 0359US5893047AMonitoring apparatus and methodDRALLIM IND·Filed 1995·Granted Apr 6, 1999·36 cites·29 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →