Inventor

PFEUFFER DONALD F

US4 patents

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

RICOH KK

3 patents

US4577955AMar 25, 1986

Electrophotographic copying apparatus including a guillotine cleaner blade arrangement and method of operation

RICOH KK10 citations71

US4361109ANov 30, 1982

Developer crossmixing apparatus

RICOH KK7 citations71

US4427756AJan 24, 1984

Developer crossmixing method

RICOH KK3 citations60

RICOH SYSTEMS INC

1 patent

US4572655AFeb 25, 1986

Electrophotographic copying apparatus and method of use including electrostatic toner recycling procedure

RICOH SYSTEMS INC3 citations60