Richard Duncan

VL Vernay Laboratories: 1 patents #18 of 57Top 35%

📍 Yellow Springs, OH: #58 of 98 inventorsTop 60%

🗺 Ohio: #42,657 of 73,341 inventorsTop 60%

Overall (All Time): #4,020,061 of 4,157,543Top 100%

Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4535818	Valve assembly	Norton A. Russell	1985-08-20