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Inventor

Laverne R. Durfee

Inventor
Harmony, NC, US

Overview

19→
Patents
1989–2019
Patent span
Performing operations
Primary field (CPC B)

Patents· 19 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

Y10Tprimary
Y10TTechnical subjects covered by former us classification40%
B23BTurning35%
B27GAccessory machines or apparatus for working wood or similar materials19%
B25BTools or bench devices not otherwise provided for, for fastening, connecting, disengaging, or holding2%
E05BLocks2%
LOC082%
PatentTitleYear
10,328,499Step drill201910,058,929Step drill bit with variable helical flute20189,687,915'Step drill'20179,156,094'Step drill for wood'2015D0723896'Fastener attracting device for a driver tool'20158,764,355'Step drill bit'20148,147,174'Spade bit'20128,070,397'Self feed bit'20118,070,398'Multi-blade self feed bit'20117,922,429'Spade bit'20117,905,690'Spade bit'20117,794,185'Spade bit'20107,544,026'Drill bit screw tip'20097,473,056'Spade bit'20097,316,527'Lockset drilling guide'20086,994,498'Lockset drilling guide'20066,910,837'Lockset drilling guide'20055,149,234'Spot-weld removing tool'19924,815,902'Stepped fluted drill'1989

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1989–1992Based in DeWitt, NE, US· patent location history
2005–2019Patents assigned to IRWIN IND TOOL CO (16)· patent assignee history
2005–2019Based in Harmony, NC, US· patent location history
2011–2015Patents assigned to DURFEE LAVERNE R (5)· patent assignee history
2015Patents assigned to HALL RYAN F (1)· patent assignee history
2018Patents assigned to IRWIN IND TOOL COMAPNY (1)· patent assignee history
2019Patents assigned to BLACK & DECKER INC (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
IRWIN IND TOOL CO162005–2019
DURFEE LAVERNE Rself52011–2015
BLACK & DECKER INC12019
HALL RYAN F12015
IRWIN IND TOOL COMAPNY12018
Locations
LocationPatentsSpan
Harmony, NC, US172005–2019
DeWitt, NE, US21989–1992