DS

Donald R. Spencer

📍 Grafton, IL: #1 of 7 inventorsTop 15%
🗺 Illinois: #15,122 of 84,256 inventorsTop 20%
Overall (All Time): #886,959 of 4,157,543Top 25%
6
Patents All Time

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
5987806 Castable fishing bobber 1999-11-23
5564557 Impact absorbing apparatus for a belt conveyor 1996-10-15
5547569 Multiple stage water clarifier 1996-08-20
5240295 Knot tying device 1993-08-31
4998685 Container for holding spools of thin line 1991-03-12
4563834 Container for fishing tackle 1986-01-14