Henry L. Woltman

3M: 2 patents #5,326 of 11,543Top 50%

📍 Afton, MN: #57 of 97 inventorsTop 60%

🗺 Minnesota: #23,881 of 52,454 inventorsTop 50%

Overall (All Time): #2,319,029 of 4,157,543Top 60%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
5050327	Retroreflective sign having improved legibility	—	1991-09-24
4726134	Roadway sign	—	1988-02-23