Inventor
CASTIGLIONE DAVID M
US33 patents
⚠️ This page may combine multiple inventors who share the name “CASTIGLIONE DAVID M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
3M INNOVATIVE PROPERTIES CO
20 patentsUS6883518B2Apr 26, 2005
Unidirectional respirator valve
3M INNOVATIVE PROPERTIES CO121 citations99
US7302951B2Dec 4, 2007
Unidirectional respirator valve
3M INNOVATIVE PROPERTIES CO74 citations98
US6732733B1May 11, 2004
Half-mask respirator with head harness assembly
3M INNOVATIVE PROPERTIES CO127 citations98
USD412573SAug 3, 1999
Nose clip for a filtering face mask
3M INNOVATIVE PROPERTIES CO52 citations96
US7849856B2Dec 14, 2010
Respirator valve
3M INNOVATIVE PROPERTIES CO26 citations93
USD471627SMar 11, 2003
Respirator facemask assembly
3M INNOVATIVE PROPERTIES CO35 citations93
USD467656SDec 24, 2002
Respirator facemask
3M INNOVATIVE PROPERTIES CO28 citations93
US6279570B1Aug 28, 2001
Filter support, assembly and system
3M INNOVATIVE PROPERTIES CO35 citations93
US6729332B1May 4, 2004
Retention assembly with compression element and method of use
3M INNOVATIVE PROPERTIES CO24 citations92
US6705317B2Mar 16, 2004
Retention assembly with compression element and method of use
3M INNOVATIVE PROPERTIES CO20 citations92
US7594510B2Sep 29, 2009
Respiratory protection device
3M INNOVATIVE PROPERTIES CO20 citations90
USD568986SMay 13, 2008
Strap carriers on a respirator
3M INNOVATIVE PROPERTIES CO13 citations84
USD890916SJul 21, 2020
Full face respirator front cover
3M INNOVATIVE PROPERTIES CO12 citations82
USD456505SApr 30, 2002
Grill pattern on air filter inlet
3M INNOVATIVE PROPERTIES CO15 citations80
USD444218SJun 26, 2001
Portion of a filter support
3M INNOVATIVE PROPERTIES CO6 citations74
US11020619B2Jun 1, 2021
Multiple chamber respirator sealing devices and methods
3M INNOVATIVE PROPERTIES CO2 citations73
USD816209SApr 24, 2018
Respirator inlet port connection seal
3M INNOVATIVE PROPERTIES CO2 citations73
US10765176B2Sep 8, 2020
Personal protective device strap connecting buckle assembly
3M INNOVATIVE PROPERTIES CO3 citations72
USD842982SMar 12, 2019
Hardhat suspension adapter for half facepiece respirators
3M INNOVATIVE PROPERTIES CO0 citations52
USD827810SSep 4, 2018
Hardhat suspension adapter for half facepiece respirators
3M INNOVATIVE PROPERTIES CO0 citations52
3M INNOVATIVE PROPERTIES COMPANY
7 patentsUSD1099309SOct 21, 2025
Bracket for respiratory sensing device
3M INNOVATIVE PROPERTIES COMPANY1 citations72
USD1029244SMay 28, 2024
Bracket for respiratory sensing device
3M INNOVATIVE PROPERTIES COMPANY3 citations72
US12173153B2Dec 24, 2024
Dual-molded polyamide-silicone composite article and methods of making
3M INNOVATIVE PROPERTIES COMPANY4 citations71
US11992078B2May 28, 2024
Headwear suspension attachment element
3M INNOVATIVE PROPERTIES COMPANY2 citations67
USD1094903SSep 23, 2025
Welding attachment for a respirator
3M INNOVATIVE PROPERTIES COMPANY0 citations62
US12017095B2Jun 25, 2024
Respirator configured to accept vision-protecting module
3M INNOVATIVE PROPERTIES COMPANY1 citations62
US12029926B2Jul 9, 2024
Respiratory protection device positive pressure seal check methods and devices
3M INNOVATIVE PROPERTIES COMPANY1 citations58