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Inventor

EMERSON ROBERT T

US8 patents
⚠️ This page may combine multiple inventors who share the name “EMERSON ROBERT T”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

COLUMBIA RIBBON CARBON MFG

4 patents
US4128430ADec 5, 1978

Master sheets and process for printing same

COLUMBIA RIBBON CARBON MFG22 citations80
US4042401AAug 16, 1977

Hectograph products and process

COLUMBIA RIBBON CARBON MFG18 citations72
US4123569AOct 31, 1978

Direct ribbon inking by gravure

COLUMBIA RIBBON CARBON MFG12 citations71
US4048952ASep 20, 1977

Direct ribbon inking by gravure

COLUMBIA RIBBON CARBON MFG12 citations71

LEEDALL PRODUCTS INC

3 patents
US4837584AJun 6, 1989

Security time clock system

LEEDALL PRODUCTS INC54 citations84
US4726864AFeb 23, 1988

Hectograph master webs and sheets, and method

LEEDALL PRODUCTS INC0 citations38
US4499140AFeb 12, 1985

Pressure-sensitive transfer elements and method

LEEDALL PRODUCTS INC0 citations38

IBM

1 patent
US4409893AOct 18, 1983

Process for printing porous image

IBM35 citations91