William M. Marshall, Sr.

📍 Salem, VA: #4 of 20 inventorsTop 20%

🗺 Virginia: #200 of 1,067 inventorsTop 20%

Overall (1989): #43,708 of 140,708Top 35%

Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4838866	Liquid pump air release system	—	1989-06-13