Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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David I. Walker — 8 Patents

NUNupro: 4 patents #7 of 34Top 25%
USUsx: 1 patents #29 of 116Top 25%
Bolton, CA: #21 of 229 inventorsTop 10%
Overall (All Time): #600,572 of 4,157,543Top 15%
8 Patents All Time
David I. Walker has been granted 8 US patents while listed as an inventor at Nupro. The first was granted in 2000 and the most recent in April 2017. David I. Walker ranks #600,572 of 4,157,543 US inventors in our database (top 14.4%). Patent records list David I. Walker in Bolton, ON, CA.

Issued Patents All Time

Showing 1–8 of 8 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
9618265 Method for tapping a steel making furnace Frank L. Kemeny 2017-04-11
8808421 System for furnace slopping prediction and lance optimization Frank L. Kemeny 2014-08-19
8097063 System for furnace slopping prediction and lance optimization Frank L. Kemeny 2012-01-17
7468090 Method for tapping a steel making furnace Frank L. Kemeny, Jeremy Jones 2008-12-23
6929773 Slag detector for molten steel transfer operations Frank L. Kemeny 2005-08-16
6737014 Slag detector for molten steel transfer operations Alex Davidkhanian, Frank L. Kemeny, Ali Langari 2004-05-18
6264716 Process for controlling the stirring energy delivered by a gas flowing through a liquid Francis L. Kemeny, Jeremy Jones 2001-07-24
6166681 Measuring the thickness of materials Gregory A. Meszaros, Roger Marquardt, John G. Estocin, Frank L. Kemeny 2000-12-26 $98,908,000