Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
DW

David K. Walker

SGSeparation Design Group: 1 patents #1 of 5Top 20%
Waynesburg, PA: #1 of 4 inventorsTop 25%
Pennsylvania: #2,306 of 7,336 inventorsTop 35%
Overall (2018): #439,523 of 503,207Top 90%
1 Patents 2018

Issued Patents 2018

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
9993765 Portable oxygen enrichment device and method of use Stephen Douglas Galbraith, Kenneth J. McGowan, Elise N. DePetris, Judith C. Galbraith 2018-06-12