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Inventor

David J. Draeger

Inventor
Byron Center, MI, US

Overview

5→
Patents
1984–2008
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.

F01Lprimary
F01LCyclically operating valves for machines or engines40%
F16BDevices for fastening or securing constructional elements or machine parts together, e.g. nails, bolts, circlips, clamps, clips or wedges20%
H01TSpark gaps20%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests20%
PatentTitleYear
7,322,329'Assembly process for hydraulic valve lifters to reduce variation in valve lift'20086,976,463'Anti-rotation deactivation valve lifter'20056,677,698'Spark plug copper core alloy'20044,764,070'Capped wheel nut assembly'1988D0274496'Hammer'1984

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1984Patents assigned to SNAP ON TOOLS CORP (1)· patent assignee history
1984Based in Kenosha, WI, US· patent location history
1988Patents assigned to HORIZONS UNLIMITED INC (1)· patent assignee history
1988Based in Woodhaven, MI, US· patent location history
2004–2008Patents assigned to DELPHI TECH INC (3)· patent assignee history
2004Based in Flushing, MI, US· patent location history
2005Based in Byron, MI, US· patent location history
2008Based in Byron Center, MI, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DELPHI TECH INC32004–2008
HORIZONS UNLIMITED INC11988
SNAP ON TOOLS CORP11984
Locations
LocationPatentsSpan
Byron Center, MI, US12008
Byron, MI, US12005
Flushing, MI, US12004
Woodhaven, MI, US11988
Kenosha, WI, US11984