P

Inventor

WITZ WOLFGANG

US13 patents
⚠️ This page may combine multiple inventors who share the name “WITZ WOLFGANG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SANFORD LP

4 patents
US6695517B2Feb 24, 2004

Free ink system

SANFORD LP13 citations82
US6632041B1Oct 14, 2003

Free ink system

SANFORD LP9 citations70
US6322269B1Nov 27, 2001

Free ink system

SANFORD LP14 citations70
US7101104B2Sep 5, 2006

Free ink system

SANFORD LP3 citations60

KOH I NOOR RAPIDOGRAPH

2 patents
US4753546AJun 28, 1988

Pressure balanced stylographic pen

KOH I NOOR RAPIDOGRAPH52 citations90
USD257857SJan 13, 1981

Drawing pen

KOH I NOOR RAPIDOGRAPH20 citations79

CRAYOLA LLC

2 patents
US9156304B2Oct 13, 2015

Ink-delivery systems

CRAYOLA LLC0 citations51
US9114662B2Aug 25, 2015

Ink-delivery systems

CRAYOLA LLC0 citations51

KOH I NOOR INC

1 patent
US5420615AMay 30, 1995

Unitary body plotter pen

KOH I NOOR INC61 citations94

BINNEY & SMITH INC

1 patent
US7607591B2Oct 27, 2009

Airbrush

BINNEY & SMITH INC28 citations91

CHARTPAK INC

1 patent
US7037015B1May 2, 2006

Roller ball pen for pigmented inks

CHARTPAK INC16 citations79

OREM CHRISTOPHER P

1 patent
US8485749B2Jul 16, 2013

Ink delivery systems

OREM CHRISTOPHER P4 citations57

(unassigned)

1 patent
US5734400AMar 31, 1998

Method and apparatus for refilling ink jet unit printer cartridges

5 citations53