Inventor · disambiguated record
Andrew D. Gledhill
Also filed as: GLEDHILL ANDREW D
5 granted patents·176 citations·filing 2002–2008
79Inventor score
Top patents by PatentIndex Score
5 records- 0189US6953096B2Expandable bit with secondary release deviceWEATHERFORD LAMB·Filed 2002·Granted Oct 11, 2005·150 cites·24 claims
- 0261US8210208B2Electrically operated hydraulic valveTIBBITTS MATTHEW H·Filed 2007·Granted Jul 3, 2012·5 cites·5 claims
- 0354US7131504B2Pressure activated release member for an expandable drillbitWEATHERFORD LAMB·Filed 2004·Granted Nov 7, 2006·17 cites·21 claims
- 0452US8430125B2Combined control valve and couplerMASSIE ANDREW E·Filed 2008·Granted Apr 30, 2013·4 cites·11 claims
- 0541US8813786B2Hydraulic valves with integral sealsTIBBITTS MATTHEW H·Filed 2007·Granted Aug 26, 2014·0 cites·8 claims
Join the waitlist — get patent alerts
Get an alert when Andrew D. Gledhill files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →