Inventor

JOHNSON JOHN DAVID

US2 patents

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

JOHNSON JOHN DAVID

1 patent

US3973730AAug 10, 1976

Apparatus for applying refractory coating to the roof linings of electric arc furnaces

JOHNSON JOHN DAVID8 citations59

MARTIN HARDISON G

1 patent

US8903099B2Dec 2, 2014

End of branch module system

MARTIN HARDISON G1 citations46