John B. G. Hedberg

TD Thermal Dynamics: 2 patents #29 of 73Top 40%

Overall (All Time): #2,357,343 of 4,157,543Top 60%

Patents All Time

Issued Patents All Time

Patent #	Title	Co-Inventors	Date
RE31544	Current unit for arc welding	—	1984-03-27
4382171	Arc welding current supply	—	1983-05-03