SH

Stewart G. Helfrich

TV The Virkler: 1 patents #1 of 11Top 10%
📍 Hamburg, PA: #28 of 57 inventorsTop 50%
🗺 Pennsylvania: #43,221 of 74,527 inventorsTop 60%
Overall (All Time): #3,724,784 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5667533 Heather dyed fabric and method of producing same Peter Hauser 1997-09-16