Inventor · disambiguated record
Laverne R. Durfee
Also filed as: DURFEE JR LAVERNE R · DURFEE LAVERNE · DURFEE LAVERNE R · DURFEE LAVERNE ROYAL
21 granted patents·7 pending applications·297 citations·filing 1987–2023
96Inventor score
Files withIRWIN IND TOOL CO11DURFEE LAVERNE R7APEX BRANDS INC6DURFEE LAVERNE1IRWIN IND TOOL COMAPNY1
Top patents by PatentIndex Score
28 records- 0194US7473056B2Spade bitIRWIN IND TOOL CO·Filed 2005·Granted Jan 6, 2009·24 cites·11 claims
- 0293US9687915B2Step drillIRWIN IND TOOL CO·Filed 2014·Granted Jun 27, 2017·11 cites·18 claims
- 0392US10328499B2Step drillIRWIN IND TOOL CO·Filed 2017·Granted Jun 25, 2019·4 cites·19 claims
- 0490US12246468B2Tri-paddle boring toolAPEX BRANDS INC·Filed 2022·Granted Mar 11, 2025·1 cites·18 claims
- 0590US8147174B2Spade bitDURFEE LAVERNE R·Filed 2011·Granted Apr 3, 2012·10 cites·12 claims
- 0689US4815902AStepped fluted drillPETERSEN MFG·Filed 1987·Granted Mar 28, 1989·57 cites·13 claims
- 0788US7544026B2Drill bit screw tipIRWIN IND TOOL CO·Filed 2007·Granted Jun 9, 2009·21 cites·13 claims
- 0887US8764355B2Step drill bitDURFEE LAVERNE R·Filed 2012·Granted Jul 1, 2014·11 cites·21 claims
- 0987US8070398B2Multi-blade self feed bitDURFEE LAVERNE R·Filed 2008·Granted Dec 6, 2011·15 cites·31 claims
- 1087US7922429B2Spade bitIRWIN IND TOOL CO·Filed 2009·Granted Apr 12, 2011·10 cites·11 claims
- 1187US7905690B2Spade bitIRWIN IND TOOL CO·Filed 2008·Granted Mar 15, 2011·10 cites·5 claims
- 1286US6910837B2Lockset drilling guideIRWIN IND TOOL CO·Filed 2003·Granted Jun 28, 2005·25 cites·19 claims
- 1383US8070397B2Self feed bitDURFEE LAVERNE R·Filed 2008·Granted Dec 6, 2011·13 cites·10 claims
- 1482US9156094B2Step drill for woodDURFEE LAVERNE R·Filed 2013·Granted Oct 13, 2015·8 cites·22 claims
- 1581US10058929B2Step drill bit with variable helical fluteIRWIN IND TOOL COMAPNY·Filed 2016·Granted Aug 28, 2018·6 cites·12 claims
- 1676US5149234ASpot-weld removing toolUNIBIT CORP·Filed 1991·Granted Sep 22, 1992·37 cites·9 claims
- 1771US6994498B2Lockset drilling guideIRWIN IND TOOL CO·Filed 2004·Granted Feb 7, 2006·12 cites·10 claims
- 1866US2023286065A1Boring tool with multi-angled tipAPEX BRANDS INC·Filed 2023·Application pending·0 cites
- 1963US2023089637A1Twist drill bitAPEX BRANDS INC·Filed 2022·Application pending·0 cites
- 2059USD723896SFastener attracting device for a driver toolIRWIN IND TOOL CO·Filed 2014·Granted Mar 10, 2015·10 cites·1 claims
- 2159US7316527B2Lockset drilling guideIRWIN IND TOOL CO·Filed 2004·Granted Jan 8, 2008·11 cites·39 claims
- 2252USD1009105STri-paddle bitAPEX BRANDS INC·Filed 2021·Granted Dec 26, 2023·1 cites·1 claims
- 2352US2024269754A1Boring toolAPEX BRANDS INC·Filed 2022·Application pending·0 cites
- 2449US2010003094A1Drill bitIRWIN IND TOOL CO·Filed 2009·Application pending·0 cites
- 2545US2008101879A1Spade-type bitDURFEE LAVERNE R·Filed 2006·Application pending·0 cites
- 2641US2008138165A1Drill bitDURFEE LAVERNE·Filed 2006·Application pending·0 cites
- 2741US2008166194A1Drill bitDURFEE LAVERNE R·Filed 2007·Application pending·0 cites
- 2832USD1066442SSelf-feed bitAPEX BRANDS INC·Filed 2022·Granted Mar 11, 2025·0 cites·1 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →