RC

Robert A. Caldwell

AL Allis-Chalmers: 3 patents #25 of 232Top 15%
Overall (All Time): #1,686,322 of 4,157,543Top 45%
3
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4229643 Consumable welding electrode — 1980-10-21
4228337 Method of electroslag welding — 1980-10-14
4228342 Electroslag weld deposit — 1980-10-14