EW

Elmer S. Welch

📍 Spooner, WI: #1 of 3 inventorsTop 35%
🗺 Wisconsin: #44 of 927 inventorsTop 5%
Overall (1982): #14,610 of 81,411Top 20%
2
Patents 1982

Issued Patents 1982

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4339111 Clean in place diaphragm valve 1982-07-13
4311164 Valve handle retention system 1982-01-19