Howard D. Irwin

EA E.I. Du Pont De Nemours And: 2 patents #17 of 304Top 6%

📍 Wilmington, DE: #13 of 164 inventorsTop 8%

🗺 Delaware: #19 of 287 inventorsTop 7%

Overall (1982): #12,805 of 81,411Top 20%

Patents 1982

Issued Patents 1982

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
4351242	Railway car truck side frame	—	1982-09-28
4311098	Railway car truck bolster	—	1982-01-19