Inventor

JOHNSON RANDALL F

US2 patents

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

JOY MM DELAWARE INC

1 patent

US5597393AJan 28, 1997

Displaceable filtering apparatus for airborne contaminates

JOY MM DELAWARE INC27 citations86

JOHNSON RANDALL F

1 patent

US8186764B2May 29, 2012

Noise reduced continuous miner

JOHNSON RANDALL F2 citations52