LexDanaLexDanabeta
Inventor

Steven D. Schmeichel

Inventor
Inver Grove Heights, MN, US

Overview

5→
Patents
1985–2019
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 5 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

F01Nprimary
F01NGas-flow silencers or exhaust apparatus for machines or engines in general30%
B01DSeparation20%
B21DWorking or processing of sheet metal or metal tubes, rods or profiles without essentially removing material10%
D04HMaking textile fabrics, e.g. from fibres or filamentary material10%
F16LPipes10%
Y02TClimate change mitigation technologies related to transportation10%
Y10TTechnical subjects covered by former us classification10%
PatentTitleYear
10,195,555Filtration media20195,803,941'Filter element'19984,632,216'Muffler apparatus and method for making same'19864,580,657'Integral fluted tube for sound suppression and exhaust ejection'19864,558,891'Clamp for exhaust system'1985

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1985–2019Patents assigned to DONALDSON CO INC (5)· patent assignee history
1985–1986Based in Inver Grove Heights, MN, US· patent location history
1986Based in Inger Grove Heights, MN, US· patent location history
1998Based in Vadnais Heights, MN, US· patent location history
2019Patents assigned to AHLSTROM MUNKSJO OYJ (1)· patent assignee history
2019Patents assigned to MUNKSJOE AHLSTROM OYJ (1)· patent assignee history
2019Based in Bloomington, MN, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DONALDSON CO INC51985–2019
AHLSTROM MUNKSJO OYJ12019
MUNKSJOE AHLSTROM OYJ12019
Locations
LocationPatentsSpan
Inver Grove Heights, Minnesota, US21985–1986
Bloomington, Minnesota, US12019
Vadnais Heights, Minnesota, US11998
Inger Grove Heights, Minnesota, US11986