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Inventor

David S. Majkrzak

Inventor
West Fargo, ND, US

Overview

23→
Patents
1981–2012
Patent span
Human necessities
Primary field (CPC A)

Patents· 23 as inventor

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

A01Dprimary
A01DHarvesting34%
F02NStarting of combustion engines10%
B27LRemoving bark or vestiges of branches7%
E01HStreet cleaning7%
F02FCylinders, pistons or casings, for combustion engines7%
Y10TTechnical subjects covered by former us classification7%
A01BSoil working in agriculture or forestry3%
A01GHorticulture3%
B02CCrushing, pulverising, or disintegrating in general3%
B60BVehicle wheels3%
PatentTitleYear
8,230,954'PTO driven hydraulic system'20128,033,340'Windrower and method of windrowing a grown product'20118,006,725'Log splittter'20117,780,102'Feed roller drive for wood chipper'20107,712,232'Concentric axis snow blower attachment'20107,658,059'Synchronous drive for split sickle bars on harvester header'20107,354,067'Compact caster wheel system'20086,397,573'Reel bat assembly'20026,324,962'Valve block mounting arrangement'20016,293,479'Feed control hydraulic circuit for wood chipper attachment'20016,199,358'Reel tine assembly'20016,074,298'Extended height combine hopper leveling auger'20005,359,835'Underwater weed roller'19945,240,189'Debris shredder and rotor'1993RE034225'Modular sickle bar sections'19934,986,012'Retractable drift cutter'19914,936,082'Mechanical air reel'19904,805,390'Modular sickle bar sections'19894,651,511'Mower assembly'19874,461,249'Method and apparatus of starting a cold engine'19844,391,235'Vehicle exhaust gas warm-up heater system'19834,305,354'Apparatus and method of heating cold engine'19814,290,654'Wheel rim mounting device for variable wheel spacing'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981–1984Patents assigned to STEIGER TRACTOR INC (3)· patent assignee history
1981–2012Based in West Fargo, ND, US· patent location history
1983–2012Patents assigned to MAJKRZAK DAVID S (4)· patent assignee history
1987–2002Patents assigned to CRARY CO (10)· patent assignee history
2001Patents assigned to CLARK EQUIPMENT CO (1)· patent assignee history
2010–2011Patents assigned to CRARY IND INC (3)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
CRARY CO101987–2002
MAJKRZAK DAVID Sself41983–2012
CRARY IND INC32010–2011
STEIGER TRACTOR INC31981–1984
CLARK EQUIPMENT CO12001
Locations
LocationPatentsSpan
West Fargo, ND, US231981–2012