Inventor · disambiguated record
John D. Crabtree
Also filed as: CRABTREE JOHN D · CRABTREE JOHN DOUGLAS
7 granted patents·1 pending application·155 citations·filing 1980–2010
86Inventor score
Top patents by PatentIndex Score
8 records- 0189US4529653AFlexible, asbestos-free gasket materialT & N MATERIALS RES LTD·Filed 1983·Granted Jul 16, 1985·65 cites·3 claims
- 0279US8339804B2Programmable routing moduleCRABTREE JOHN D·Filed 2010·Granted Dec 25, 2012·8 cites·20 claims
- 0378US6154683ALow voltage industrial control system providing intrinsically safe operationROCKWELL TECH LLC·Filed 1998·Granted Nov 28, 2000·53 cites·19 claims
- 0473US7800919B2Programmable routing moduleROCKWELL AUTOMATION TECH INC·Filed 2006·Granted Sep 21, 2010·5 cites·20 claims
- 0564US7037043B1Methods for lining pipes and connecting the lined pipe with adjacent or lateral pipesPIPE LINERS INC·Filed 2005·Granted May 2, 2006·4 cites·9 claims
- 0659US7172369B2Methods for aligning pipes and connecting the lined pipe with adjacent or lateral pipesWEATHERFORD U S L P·Filed 2006·Granted Feb 6, 2007·4 cites·18 claims
- 0752US4300075AAC Regulator system for quartz iodine lampsNUARC CO·Filed 1980·Granted Nov 10, 1981·16 cites·14 claims
- 0842US2007018455A1Apparatus and methods for fusing non-cylindrical thermoplastic pipe endsPIPE LINERS INC·Filed 2005·Application pending·0 cites
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →