DJ

Donald Jansma

BH Bissell Healthcare: 2 patents #1 of 2Top 50%
📍 Grand Rapids, MI: #8 of 63 inventorsTop 15%
🗺 Michigan: #263 of 3,452 inventorsTop 8%
Overall (1989): #28,854 of 140,708Top 25%
2
Patents 1989

Issued Patents 1989

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4877040 Cigarette holder with filter modifier, and related method Howard W. Stemm 1989-10-31
4856540 Cigarette filter modifier Howard W. Stemm 1989-08-15