| Patents for A01B 21 - Harrows with rotary non-driven tools (576) |
|---|
| 11/03/1998 | US5829537 Clay court scarifier |
| 10/14/1998 | CN1195466A Drawing harrowing machine |
| 07/15/1998 | CN2285954Y Reciprocating differential sitting ploughing rolling harrow for walking tractor |
| 06/24/1998 | CN2284483Y Wing-foldable disc harrow |
| 04/22/1998 | CN2279048Y Balancing device for offset disc harrow |
| 04/01/1998 | CN2277161Y Harrow for use in rice field |
| 01/29/1998 | DE19630079A1 Soil-cultivator machine with links for tractor, and rows of hollow discs |
| 12/04/1997 | WO1997044995A1 Self-cleaning rotary trash harrow |
| 12/04/1997 | CA2256541A1 Self-cleaning rotary trash harrow |
| 11/06/1997 | WO1997040660A1 Agricultural machine |
| 09/02/1997 | US5662173 Elongate ground working implement |
| 05/15/1997 | DE19544199A1 Seed drill with bin dosimeter and distributor |
| 05/13/1997 | US5628373 Earth working implement |
| 01/08/1997 | EP0752201A1 Disc harrow transformable between X and V type |
| 12/18/1996 | EP0737029A4 A rolling cultivator |
| 10/16/1996 | EP0737029A1 A rolling cultivator |
| 11/08/1995 | CN2211687Y Rolling rake |
| 10/17/1995 | US5458203 Device for working the ground |
| 10/03/1995 | US5454434 Agricultural plow |
| 08/02/1995 | CN2204085Y Weight-lopsided suspension harrow of automatic wide-margin rotary displacement |
| 07/05/1995 | EP0660658A1 Improvements to ploughs, arrangements and implements therefor and methods of cultivation using same |
| 05/30/1995 | US5419402 Rotary hoe |
| 03/23/1995 | WO1995007605A1 A rolling cultivator |
| 03/07/1995 | US5394945 Precision weeding machine for row crops |
| 01/04/1995 | CN2186475Y Semi-pendulous loosener |
| 01/03/1995 | CA1333761C Rotary hoe |
| 11/03/1994 | DE4409231A1 Disc harrow with level compensation |
| 10/19/1994 | EP0619937A1 Precision weeding machine for row crops |
| 10/18/1994 | US5355963 Adapted to be pulled behind a power source |
| 10/17/1994 | CA2121395A1 Precision weeding machine for row crops |
| 08/17/1994 | EP0611237A1 Soil working machine, especially disc harrow, with reduced transport width and adjustable position of the working tool |
| 06/01/1994 | EP0599565A1 Reversible disc harrow |
| 03/30/1994 | CN2159643Y Disk type paddy field cultivator |
| 03/22/1994 | CA2078702A1 Rotary or active harrow |
| 03/17/1994 | WO1994005144A1 Improvements to ploughs, arrangements and implements therefor and methods of cultivation using same |
| 03/15/1994 | CA1327718C Rotary hoe tool |
| 01/19/1994 | EP0578650A1 Agricultural plough |
| 01/18/1994 | US5279236 Seed planter |
| 12/07/1993 | US5267619 Disk harrow assembly |
| 12/01/1993 | EP0571504A1 Improved tilling apparatus |
| 11/09/1993 | US5259460 Device for working the ground |
| 08/05/1993 | WO1993014619A1 Disc plough |
| 08/03/1993 | CA1320817C Method of assembling a disk |
| 03/09/1993 | US5191942 Agricultural frame for propulsion of ground working implements |
| 03/02/1993 | US5190112 Rotary hoe extension |
| 01/21/1993 | WO1993000790A1 Flexible rotating chain-harrow |
| 12/01/1992 | US5167286 Disc harrow implement |
| 11/17/1992 | CA1310221C Remotely adjustable disk leveling system |
| 11/12/1992 | DE4125489C1 Tractor drawn disc narrow with X=shaped disc roller - has front and rear rollers, forwards swivelable on frame centre girder |
| 10/27/1992 | US5158145 Cultivator |
| 10/06/1992 | WO1992017051A1 Improved tilling apparatus |
| 10/06/1992 | WO1992017050A1 Agricultural plough |
| 10/06/1992 | CA2107224A1 Agricultural plough |
| 10/06/1992 | CA2107125A1 Improved tilling apparatus |
| 09/20/1992 | CA2038574A1 Cultivator |
| 09/01/1992 | CA2014441C Active harrow |
| 07/28/1992 | CA1305628C Tool |
| 04/30/1992 | WO1992006580A1 Device for working the ground |
| 04/30/1992 | CA2094236A1 Device for working the ground |
| 04/22/1992 | EP0481538A1 Device for working the ground |
| 02/18/1992 | USRE33822 Hinge-type offset wheel harrow |
| 01/21/1992 | US5082064 Tillage implement having depth adjustable discs |
| 01/14/1992 | US5080178 Agricultural tillage implement with improved soil leveler using staggered discs |
| 12/21/1991 | CA2019574A1 Rotary soil working tool |
| 12/20/1991 | CA2021394A1 Agricultural frame for propulsion of ground working implements |
| 12/19/1991 | CA2019316A1 Cultivator |
| 11/12/1991 | US5064001 Rotary soil working tool |
| 09/25/1991 | CN2085143U Harrow for preserving moisture in top soil |
| 08/27/1991 | US5042590 Tapered C-spring for a disk harrow |
| 08/20/1991 | US5040617 Active harrow |
| 06/12/1991 | CN2078517U Tilling and harrowing implement |
| 05/22/1991 | EP0428198A2 Device for working the ground |
| 05/02/1991 | WO1991005458A1 Device for working the ground |
| 05/02/1991 | CA2067749A1 Device for working the ground |
| 04/24/1991 | CN2075408U Miniature paddy fields harrow with seats |
| 04/23/1991 | CA1283321C Adjustable shank mount |
| 03/19/1991 | US5000270 Tool assembly |
| 02/12/1991 | US4991660 Rolling hoe |
| 01/16/1991 | CN2069196U Cultivated rake |
| 01/08/1991 | CA1278720C Soil aerating equipment |
| 10/18/1990 | WO1990011677A1 Plough |
| 06/12/1990 | US4932476 Leveling position indicator |
| 05/29/1990 | US4928774 Cultivator with improved disc positioning means |
| 03/14/1990 | EP0358014A2 Rolling cultivator |
| 02/07/1990 | CN2052184U 机械式土壤破碎器 Mechanical soil breaker |
| 01/16/1990 | US4893682 Rotating flexible implement for soil erosion control |
| 11/15/1989 | EP0342083A1 Disc-harrow with a self-supporting frame and pivotally mounted tool gang subframes for swinging movement in a fore-and-aft position for transport on the road |
| 10/03/1989 | US4871031 Rotary hoe tool |
| 08/02/1989 | CN2041878U Dual-purpose harrow for both paddy field and dry land |
| 07/04/1989 | US4844173 Method of assembling a disk |
| 06/20/1989 | US4840232 Soil aerating equipment |
| 04/24/1989 | EP0311630A4 Prickle chain. |
| 04/19/1989 | EP0311630A1 Prickle chain |
| 04/05/1989 | CN2035163U Wet-field smoothing machine |
| 03/28/1989 | US4815544 Cultivator disc adjuster |
| 03/07/1989 | US4809786 In a towed tillage implement |
| 12/01/1988 | DE3714061A1 Double rotary-spade harrow |
| 10/06/1988 | DE3710023A1 Plough follower |
| 09/06/1988 | US4768596 Soil crust loosening apparatus |
| 08/31/1988 | EP0280048A1 Implement for levelling the soil |