Roberta C. Harper — 3 Patents at 3M

Roberta C. Harper has been granted 3 US patents while listed as an inventor at 3M. The first was granted in 2000 and the most recent in May 2001. Roberta C. Harper ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Roberta C. Harper in Ripon, WI, US.

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
6234171	Molded respirator containing sorbent particles	James E. Springett, Leonard W. Barrett	2001-05-22	$33,790,000
6133173	Nonwoven cohesive wrap	John E. Riedel, Eugene G. Joseph	2000-10-17	$21,776,000
6102039	Molded respirator containing sorbent particles	James E. Springett, Leonard W. Barrett	2000-08-15	$32,235,000

Roberta C. Harper — 3 Patents

Issued Patents All Time

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