DS

David W. Siffert

UN Unknown: 1 patents #29,356 of 83,584Top 40%
📍 Traverse City, MI: #166 of 318 inventorsTop 55%
🗺 Michigan: #49,615 of 86,293 inventorsTop 60%
Overall (All Time): #3,991,093 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4572470 Non-removable picture frame hanger and hanging method — 1986-02-25