Peter S. Leonard — 3 Patents at 3M

Peter S. Leonard has been granted 3 US patents while listed as an inventor at 3M. The first was granted in 2020 and the most recent in March 2025. Peter S. Leonard ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Peter S. Leonard in Middridge, GB.

Patents per Year

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
12245648	Maintenance-free respirator that has concave portions on opposing sides of mask top section	John M. Facer, Christopher P. Henderson, Desmond T. Curran	2025-03-11
11877604	Maintenance-free respirator that has concave portions on opposing sides of mask top section	John M. Facer, Christopher P. Henderson, Desmond T. Curran	2024-01-23	$23,666,000
10827787	Maintenance-free respirator that has concave portions on opposing sides of mask top section	John M. Facer, Christopher P. Henderson, Desmond T. Curran	2020-11-10	$67,440,000

Peter S. Leonard — 3 Patents

Patents per Year

Issued Patents All Time

Patent Widget