Inventor

CHALLMAN ROBERT G

US6 patents

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

SANFORD LP

2 patents

US7488130B2Feb 10, 2009

Seal assembly for retractable instrument

SANFORD LP23 citations91

US7775734B2Aug 17, 2010

Seal assembly for retractable instrument

SANFORD LP8 citations82

CHALLMAN ROBERT G

2 patents

US8393814B2Mar 12, 2013

Retractable instrument having a two stage protraction/retraction sequence

CHALLMAN ROBERT G9 citations79

US8568047B2Oct 29, 2013

Retractable instrument having a two stage protraction/retraction sequence

CHALLMAN ROBERT G0 citations47

FREUDENBERG CARL KG

1 patent

US11564549B1Jan 31, 2023

Multidirectional dusting tool

FREUDENBERG CARL KG2 citations71

GILLUM CHRISTOPH

1 patent

US9050850B2Jun 9, 2015

Micro motion poppet valve assembly for delivery of ink with large pigment particles to a writing nib and writing instrument comprising same

GILLUM CHRISTOPH7 citations70