Roger D. Erwin

📍 Danvers, MA: #149 of 334 inventorsTop 45%

🗺 Massachusetts: #33,482 of 88,656 inventorsTop 40%

Overall (All Time): #1,623,421 of 4,157,543Top 40%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
6254140	Segmented flange including a shim	—	2001-07-03
6079753	Segmented flange including a shim	—	2000-06-27
5755464	Segmented flange structure including a shim	—	1998-05-26