Inventor

LEHMANN JOHN M

US3 patents

⚠️ This page may combine multiple inventors who share the name “LEHMANN JOHN M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

MCDERMOTT TECHNOLOGY INC

2 patents

US5773786AJun 30, 1998

Method and device for reducing overpenetration at the start of plasma arc welds

MCDERMOTT TECHNOLOGY INC3 citations60

US6495790B2Dec 17, 2002

Plasma arc keyhole welding stability and quality through titanium nitride additions

MCDERMOTT TECHNOLOGY INC1 citations43

US ENERGY

1 patent

US6037561AMar 14, 2000

Method and device for reducing overpenetration at the start of plasma arc welds

US ENERGY0 citations49