Don J. Marshall

📍 Churchton, MD: #3 of 8 inventorsTop 40%

🗺 Maryland: #8,004 of 35,612 inventorsTop 25%

Overall (All Time): #1,292,754 of 4,157,543Top 35%

Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
D359577	Ashtray	—	1995-06-20
4775171	High pressure field repair coupling	—	1988-10-04
4317423	Anchor	—	1982-03-02
4297079	Variable pitch marine propeller	—	1981-10-27