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Inventor

Steven J. Butkiewicz

Inventor
Wyoming, MI, US

Overview

2→
Patents
1996–2012
Patent span
Human necessities
Primary field (CPC A)

Patents· 2 as inventor

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

A46Bprimary
A46BBrushes25%
A47LDomestic washing or cleaning25%
F01NGas-flow silencers or exhaust apparatus for machines or engines in general25%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests25%
PatentTitleYear
8,117,714'Vacuum cleaner with hair collection element'20125,495,873'Patterned air gap engine exhaust conduit'1996

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1996Patents assigned to BENTELER IND INC (1)· patent assignee history
1996–2012Based in Wyoming, MI, US· patent location history
2012Patents assigned to BISSELL HOMECARE INC (1)· patent assignee history
2012Patents assigned to BUTKIEWICZ STEVEN J (1)· patent assignee history
2012Patents assigned to GRAHAM BRANDON (1)· patent assignee history
2012Patents assigned to HEIDENGA DANIEL M (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
BENTELER IND INC11996
BISSELL HOMECARE INC12012
BUTKIEWICZ STEVEN Jself12012
GRAHAM BRANDON12012
HEIDENGA DANIEL M12012
Locations
LocationPatentsSpan
Wyoming, MI, US21996–2012