DH

David U. Hillstrom

MD Marketing Displays: 50 patents #1 of 51Top 2%
MI Marketing Displays International: 4 patents #2 of 3Top 70%
BG B. F. Goodrich: 1 patents #389 of 734Top 55%
📍 Novi, MI: #29 of 1,560 inventorsTop 2%
🗺 Michigan: #717 of 86,293 inventorsTop 1%
Overall (All Time): #43,402 of 4,157,543Top 2%
57
Patents All Time

Issued Patents All Time

Showing 51–57 of 57 patents

Patent #TitleCo-InventorsDate
4730803 Ground access elevated pole banner 1988-03-15
4714220 Sign stand assembly Dennis Cope 1987-12-22
4691892 Sign and sign stand Ronald E. Grewe, James R. Seely, Cecil E. Ursprung 1987-09-08
4648169 Method of mounting universal mounting bracket for gas pump toppers James R. Seely 1987-03-10
4592530 Universal mounting bracket for gas pump toppers James R. Seely 1986-06-03
D276445 Illuminated sign with clock 1984-11-20
4433935 Sign bracket Keith A. Main 1984-02-28