Inventor
William A. Mittelstadt
Inventor
Woodbury, MN, US
Overview
Patents· 45 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
A62Bprimary
A62BDevices, apparatus or methods for life-saving26%
LOC2918%
A41DOuterwear11%
A61MDevices for introducing media into, or onto, the body11%
A61BDiagnosis5%
F16KValves5%
A42BHats4%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%
Y10TTechnical subjects covered by former us classification4%
A44BButtons, pins, buckles, slide fasteners, or the like3%
PatentTitleYear
11,052,268Respirator negative pressure fit check devices and methods202110,391,338Sleeve-fit respirator cartridge201910,143,864Respirator having noncircular centroid-mounted exhalation valve20189,950,202Respirator negative pressure fit check devices and methods20189,776,023'Respiratory mask having a nose support extension'2017D0787660'Respirator mask having a face seal flexing region'2017D0787659'Respirator with face seal flexing region'2017D0779674'Filter element having a connector'2017D0776258'Respirator with face seal multiple flexing region'20179,517,367'Respiratory mask having a clean air inlet chamber'20169,510,626'Sleeve-fit respirator cartridge'2016D0767116'Respirator mask having an exhalation port'2016D0759807'Respirator mask exhalation port'20169,259,058'Personal protective equipment strap retaining devices'20169,247,788'Personal protective equipment strap retaining devices'2016D0744088'Respirator mask having a circular button'2015D0743536'Respirator mask having a circular button'2015D0742504'Respirator mask'2015D0740932'Respirator with raised face seal flexing region'20159,149,669'Respiratory protection device harness assembly'20158,839,785'Respirator harness having collapsible head cradle'20148,717,244'RFID tag with a modified dipole antenna'2014D0690415'Respirator support structure'2013D0655404'Respirator mask body'2012D0652507'Respirator mask body'20127,849,856'Respirator valve'20107,320,722'Respiratory protection device that has rapid threaded clean air source attachment'20087,302,951'Unidirectional respirator valve'20076,883,518'Unidirectional respirator valve'20056,732,733'Half-mask respirator with head harness assembly'2004D0471627'Respirator facemask assembly'2003D0467656'Respirator facemask'20026,298,498'Protective helmet system'20016,279,570'Filter support, assembly and system'2001D0444218'Portion of a filter support'20016,102,033'Attachment system for replacement helmet respirator lens'20006,035,451'Protective helmet system with cam for attaching first and second face shields thereto'20005,720,281'Eye shield for a respiratory mask'19985,689,833'Eye shield for a respiratory mask'19975,626,585'Ligating clip advance'19975,562,655'Surgical apparatus having a universal handle for actuating various attachments'19965,374,252'Locking pneumoneedle'1994D0353668'Pneumoneedle'19945,306,284'Surgical instrument'19945,011,187'Binding system for connected fan folded sheets'1991Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1991–1998Patents assigned to MINNESOTA MINING & MFG (6)· patent assignee history
1991–1994Based in St. Paul, MN, US· patent location history
1994–2021Based in Woodbury, MN, US· patent location history
2000–2021Patents assigned to 3M INNOVATIVE PROPERTIES CO (37)· patent assignee history
2012–2014Patents assigned to MITTELSTADT WILLIAM A (5)· patent assignee history
2012–2013Patents assigned to ABEL NATHAN A (2)· patent assignee history
2012–2014Patents assigned to CASTIGLIONE DAVID M (2)· patent assignee history
2019Based in Cottage Grove, MN, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| 3M INNOVATIVE PROPERTIES CO | 37 | 2000–2021 |
| MINNESOTA MINING & MFG | 6 | 1991–1998 |
| MITTELSTADT WILLIAM Aself | 5 | 2012–2014 |
| ABEL NATHAN A | 2 | 2012–2013 |
| CASTIGLIONE DAVID M | 2 | 2012–2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Woodbury, Minnesota, US | 41 | 1994–2021 |
| St. Paul, Minnesota, US | 3 | 1991–1994 |
| Cottage Grove, Minnesota, US | 1 | 2019 |