Inventor · disambiguated record
Guy Lefort
Also filed as: LEFORT GUY · LEFORT GUY JAMES
4 granted patents·73 citations·filing 1999–2012
73Inventor score
Top patents by PatentIndex Score
4 records- 0167US6279671B1Roller cone bit with improved seal gland designFiled 1999·Granted Aug 28, 2001·54 cites·13 claims
- 0256US6752223B2Roller cone bit with improved seal gland designHALLIBURTON ENERGY SERV INC·Filed 2001·Granted Jun 22, 2004·19 cites·7 claims
- 0346US10214966B2Rotary drill bits with back-up cutting elements to optimize bit lifeCHEN SHILIN·Filed 2012·Granted Feb 26, 2019·0 cites·25 claims
- 0435US9677341B2Drill bit with extended life sealANDERLE SETH G·Filed 2010·Granted Jun 13, 2017·0 cites·20 claims
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