DOUGLAS DYNAMICS, L.L.C.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
E01H STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; CLEANING LAND; DISPERSING FOG IN GENERAL 138
 
  
 
A01B SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL 133
 
  
 
B60L ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL 175
 
  
 
B60P VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS 137
 
  
 
B60R VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR 1109
 
  
 
E01C CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR 128
 
  
 
E05D HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS, OR WINGS 133

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9822563 Method and apparatus for installing cutting edges on a V-blade plowNov 30, 15Nov 21, 17[E01H, E05D]
9200418 Method and apparatus for installing cutting edges on V-blade plowFeb 26, 13Dec 01, 15[E01H]
8850724 Plow with pivoting blade wingFeb 15, 13Oct 07, 14[E01H, A01B]
8607482 Plow with pivoting blade wing(s)Feb 28, 11Dec 17, 13[E01H]
7797859 Snowplow and mount assemblyMar 23, 10Sep 21, 10[E01H]
7737576 Vehicle mounted accessory with multiplexingJul 15, 08Jun 15, 10[B60L]
7681337 Plow with blade wingJan 17, 06Mar 23, 10[E01H]
7430821 Snowplow and mount assemblySep 20, 05Oct 07, 08[E01H]
6711837 Snowplow mounting assemblyFeb 28, 03Mar 30, 04[E01H]
6526677 Snowplow mounting assemblyOct 06, 00Mar 04, 03[E01H]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2007/0089,327 Plow with blade wingAbandonedOct 21, 05Apr 26, 07[E01H]
2007/0068,049 ADJUSTABLE WING PLOWAbandonedNov 14, 06Mar 29, 07[E01H]
7152883 Ballast assembly for vehiclesExpiredDec 30, 03Dec 26, 06[B62D]
2006/0005,434 Snowplow assemblyAbandonedSep 13, 05Jan 12, 06[E01H]
2005/0120,595 Snowplow mounting assemblyAbandonedJan 24, 05Jun 09, 05[E01H]
2004/0172,858 Snowplow mounting assemblyAbandonedMar 19, 04Sep 09, 04[E01H]
2002/0171,291 Vehicle mounted accessory with multiplexingAbandonedMar 21, 02Nov 21, 02[B60L]
6000150 Hydraulic and electrical control systems for use with vehicle accessory unitsWithdrawnFeb 21, 97Dec 14, 99[]
5649666 Motor-powered spreading apparatus for use with articulating dump boxesExpiredApr 26, 96Jul 22, 97[E01C, A01C]
5125174 Removable snowflow with a pivotable lift standExpiredApr 15, 91Jun 30, 92[E01H]
4999935 Hydraulic system and apparatus for use with vehicle accessory unitsExpiredMay 31, 90Mar 19, 91[E01H]
4481988 Log splitterExpiredNov 14, 83Nov 13, 84[B27L]
4304056 Snow plow mounting assemblyExpiredJun 27, 80Dec 08, 81[E02F]
4304057 Snow plow assembly including linear actuatorExpiredJun 27, 80Dec 08, 81[E01H]
4280062 Auxiliary light wiring harnessExpiredAug 22, 79Jul 21, 81[H02B]
4227818 Warning system for fluid mixing and dispensng systemExpiredNov 07, 77Oct 14, 80[B01F]
4206602 Single lever hydraulic system control mechanismExpiredApr 19, 79Jun 10, 80[F15B, G05G]

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