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Inventor

RITCHIE ROBERT T

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

IBM

3 patents
US4202542AMay 13, 1980

Apparatus for handling flexible sheet material of different sizes

IBM76 citations93
US4990967AFeb 5, 1991

Copying method and apparatus

IBM17 citations70
US4266231AMay 5, 1981

Ink jet with retractable electrode and secondary ink catcher

IBM8 citations67

RITCHIE ROBERT T

1 patent
US7530202B2May 12, 2009

Clamp for a guy guard

RITCHIE ROBERT T1 citations43