Inventor · disambiguated record
Donald L. Douglas
Also filed as: DOUGLAS DONALD L
4 granted patents·51 citations·filing 1986–2009
76Inventor score
Top patents by PatentIndex Score
4 records- 0162US4759469AApparatus and method for injecting balls into a wellSPECIAL PROJECTS MFG INC·Filed 1986·Granted Jul 26, 1988·24 cites·3 claims
- 0256US4889259AApparatus for injecting balls into a wellSPECIAL PROJECTS MANUFACTURING·Filed 1988·Granted Dec 26, 1989·18 cites·8 claims
- 0354US6712687B1Big game gambrelVIBRASHINE INC·Filed 2002·Granted Mar 30, 2004·6 cites·17 claims
- 0449US8096193B2Turbine flow meter having easily removable meter cartridgeFINK DANIEL R·Filed 2009·Granted Jan 17, 2012·3 cites·24 claims
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