HI

Howard D. Irwin

EA E.I. Du Pont De Nemours And: 3 patents #2,229 of 8,010Top 30%
📍 Wilmington, DE: #1,052 of 3,182 inventorsTop 35%
🗺 Delaware: #2,150 of 7,163 inventorsTop 35%
Overall (All Time): #1,307,835 of 4,157,543Top 35%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
4528846 Measuring devices for watercraft 1985-07-16
4351242 Railway car truck side frame 1982-09-28
4311098 Railway car truck bolster 1982-01-19
RE30461 Resilient center bearing assembly William H. Bogar, deceased 1980-12-30