Inventor
Robert G. Challman
Inventor
Naperville, IL, US
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B43Kprimary
B43KImplements for writing or drawing56%
A45DHairdressing or shaving equipment22%
B43LArticles for writing or drawing upon22%
PatentTitleYear
9,050,850'Micro motion poppet valve assembly for delivery of ink with large pigment particles to a writing nib and writing instrument comprising same'20158,568,047'Retractable instrument having a two stage protraction/retraction sequence'20138,393,814'Retractable instrument having a two stage protraction/retraction sequence'20137,775,734'Seal assembly for retractable instrument'20107,488,130'Seal assembly for retractable instrument'2009Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2009–2015Patents assigned to SANFORD LP (5)· patent assignee history
2009–2015Based in Naperville, IL, US· patent location history
2013–2015Patents assigned to CHALLMAN ROBERT G (3)· patent assignee history
2013Patents assigned to ARENAS JAIME (2)· patent assignee history
2015Patents assigned to GILLUM CHRISTOPH (1)· patent assignee history
2015Patents assigned to MATICE CHRISTOPHER (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SANFORD LP | 5 | 2009–2015 |
| CHALLMAN ROBERT Gself | 3 | 2013–2015 |
| ARENAS JAIME | 2 | 2013 |
| GILLUM CHRISTOPH | 1 | 2015 |
| MATICE CHRISTOPHER | 1 | 2015 |
Locations
| Location | Patents | Span |
|---|---|---|
| Naperville, Illinois, US | 5 | 2009–2015 |