David J. Rohrbaugh

📍 Oakland, MD: #4 of 25 inventorsTop 20%

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

Overall (All Time): #1,272,847 of 4,157,543Top 35%

Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
6402611	Hinged mine stopping	—	2002-06-11
5904042	Diesel exhaust conditioning system	—	1999-05-18
5647721	Miniature, portable, self-contained power machine	—	1997-07-15
5423654	Miniature, portable, self-contained power machine	—	1995-06-13