| Patents for E01H 4 - Working on surfaces of snow or ice in order to make them suitable for traffic or sporting purposes, e.g. by compacting snow (708) |
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| 05/18/1988 | EP0130502B1 Application of a heat and cold exchanger |
| 04/19/1988 | US4738037 Track maintenance vehicle with vertically adjustable track conditioner implement, particularly a snow tiller apparatus |
| 03/15/1988 | CA1234168A1 Snow transfer machine |
| 03/08/1988 | CA1233686A1 Apparatus and method for making snow roads |
| 03/01/1988 | US4728536 Spreading foam layer |
| 02/23/1988 | US4726129 For mounting on the rear of a vehicle used for track maintenance |
| 01/19/1988 | CA1231575A1 Snow vehicle for the maintenance of cross country skiing tracks |
| 01/12/1988 | US4718183 Snow tiller |
| 01/07/1988 | EP0251179A2 Track for track maintenance vehicles |
| 11/10/1987 | US4705320 Ice resurfacing machine blade holder |
| 10/28/1987 | EP0242437A2 Method for adjusting the penetration range of a skitrack grooming vehicle, and vehicle therefor |
| 10/21/1987 | EP0242279A1 Process and apparatus for the pneumatic transport of snow |
| 09/29/1987 | CA1227367A1 Foldable snow compactor |
| 09/24/1987 | DE3608960A1 Self-propelled ice preparation machine for ice rinks |
| 09/15/1987 | US4693023 Snow shaping means |
| 07/01/1987 | EP0226711A2 Rotary snow cutter |
| 04/14/1987 | US4656762 Ice preparation machine for ice tracks |
| 04/08/1987 | EP0217153A2 Rotary snow cutter |
| 04/01/1987 | EP0216753A2 Groomer for cross-country ski slopes |
| 03/24/1987 | US4651451 Lightweight snow compactor for ski runs |
| 03/24/1987 | US4651450 Packer bar assembly |
| 03/17/1987 | US4650011 Method and apparatus for drilling a hole in an ice formations and pumping water out from such hole |
| 02/26/1987 | DE3529432A1 Ice working slide of an ice surface preparation machine |
| 02/25/1987 | EP0211380A2 Snow-grooming vehicle with a ground working device adjustable in height, particularly a rotary snow cutter |
| 06/10/1986 | CA1205663A1 Apparatus for forming cross country ski tracks |
| 05/06/1986 | US4586275 Ice surfacing apparatus |
| 02/25/1986 | US4572315 Power hitch |
| 02/18/1986 | US4571117 Method and apparatus for forming an ice road over snow-covered terrain |
| 02/18/1986 | CA1200711A1 Means for making ski trails |
| 12/24/1985 | US4560303 Apparatus for forming cross country skiing tracks in a snow covered surface |
| 12/24/1985 | US4559725 Rotary tiller for maintaining cross country ski trails |
| 11/06/1985 | EP0160195A2 Device for controlling the movements of a levelling blade of a ski track grooming vehicle |
| 10/29/1985 | US4549364 Apparatus and method for making snow roads |
| 10/08/1985 | CA1194843A1 Vehicle with detachable implement |
| 10/01/1985 | US4544304 Ice aggregate road and method and apparatus for constructing same |
| 09/10/1985 | CA1193163A1 Ice surfacing apparatus |
| 09/03/1985 | US4538369 Snow transfer installation |
| 06/18/1985 | US4523398 Track former for cross country ski tracks with means to move former to transport position |
| 06/04/1985 | US4520582 Ski trails rotary cutter and crusher drag unit |
| 05/08/1985 | EP0140139A2 Smooth shield for a snow vehicle |
| 05/08/1985 | EP0139959A2 Rotary cutter |
| 05/08/1985 | EP0139865A2 Ski track grooming vehicle |
| 04/09/1985 | US4509768 Vehicle with detachable implement |
| 04/02/1985 | CA1184800A1 Means for making a ski trail |
| 02/19/1985 | CA1182638A1 Tool mounting apparatus |
| 01/09/1985 | EP0130502A2 Application of a heat and cold exchanger |
| 11/14/1984 | EP0124646A1 Apparatus for compacting snow |
| 10/30/1984 | US4479312 Foldable snow compactor with side wings pivotable behind central blade |
| 10/30/1984 | CA1176894A1 Ice aggregate road and method and apparatus for constructing same |
| 07/31/1984 | US4462172 Quick disconnect blade tool mounting apparatus |
| 05/22/1984 | CA1167772A1 Curling ice melter |
| 04/25/1984 | EP0106731A1 Machine for transporting snow |
| 04/04/1984 | EP0104302A1 Tool mounting apparatus |
| 04/03/1984 | US4440520 Ice aggregate road and method and apparatus for constructing same |
| 03/20/1984 | US4437245 Means for making a ski trail |
| 12/21/1983 | EP0096200A1 Vehicle with a process implement |
| 09/28/1983 | EP0089460A2 Apparatus for maintaining ski trails |
| 09/20/1983 | US4404762 Ski trail resurfacing apparatus |
| 09/14/1983 | EP0088283A1 Device for a snow-grooming vehicle for packing and preparing the snow cover of a ski-run |
| 07/12/1983 | CA1149661A1 Machine arrangement for forming tracks and/or levelling surfaces related to cross-country ski trails or downhill ski slopes |
| 07/05/1983 | US4391051 Machine arrangement for forming tracks and/or levelling surfaces related to cross-country ski trails or downhill ski slopes |
| 06/29/1983 | EP0082450A1 Device for the automatic blade-levelling of a track preparing machine in respect of the snow surface |
| 03/09/1983 | EP0073438A2 Apparatus for loading and transporting snow |
| 02/08/1983 | US4372617 Ice edger for ice resurfacing machine |
| 01/11/1983 | CA1139145A1 Tracking or grading unit for ski-trails and paths |
| 01/04/1983 | CA1138699A1 Apparatus for preparing ski slopes |
| 11/30/1982 | CA1136465A1 Apparatus for producing ski tracks for a ski trail |
| 11/23/1982 | US4359831 Reversibly powered rotary snow tiller |
| 09/22/1982 | EP0060383A1 Ski track roller |
| 09/14/1982 | US4348825 Tracking or grading unit for ski-trails and paths |
| 08/18/1982 | EP0057743A1 Cross-country ski track forming device |
| 07/27/1982 | US4341027 Snow treatment apparatus for grooming skiing slopes, trails or the like and a method of operating same |
| 07/06/1982 | US4337586 Apparatus for the handling and conditioning of snow |
| 06/02/1982 | EP0052611A1 Revesible powered rotary snow tiller |
| 04/13/1982 | CA1121594A1 Device for preparing the surface of ice rinks |
| 03/02/1982 | US4317298 Ice scraper |
| 01/26/1982 | US4312142 Device for preparing the surface of ice rinks |
| 12/22/1981 | US4306362 Blade assembly |
| 11/26/1981 | WO1981003353A1 Reversibly powered rotary snow tiller |
| 09/03/1981 | WO1981002391A1 Device for making skiing tracks |
| 09/01/1981 | CA1108052A1 Retinol acetate skin-care compositions |
| 08/11/1981 | US4282666 Method and apparatus for breaking hard snow |
| 07/14/1981 | CA1104818A1 Ice scraper |
| 06/09/1981 | US4271612 Apparatus for producing ski tracks for a ski trail |
| 04/16/1981 | WO1981001024A1 Device for removing snow |
| 01/13/1981 | US4244662 Snow groomer |
| 10/14/1980 | CA1087432A1 Snowmobile trail groomer |
| 05/13/1980 | US4202118 Snowmobile trail groomer |
| 08/07/1979 | US4163329 Apparatus for resurfacing a snow layer |
| 07/31/1979 | CA1059312A1 Method and apparatus for regeneration of skiing courses |
| 05/15/1979 | CA1054657A1 Method and device for handling snow |
| 03/27/1979 | US4145823 Snow removing device |
| 12/05/1978 | US4127949 Snowmobile trail groomer |
| 11/21/1978 | US4125915 Board brush for ice-resurfacing machine |
| 10/31/1978 | US4122614 Nordic ski track sled |
| 10/24/1978 | US4121431 Process for the repair and restoration of ice tracks |
| 09/19/1978 | CA1038681A1 Ski trail forming and conditioning drag |
| 09/05/1978 | US4110919 Ski trail forming and conditioning drag |
| 04/11/1978 | US4083131 Apparatus for regeneration of skiing courses |
| 11/22/1977 | US4058913 Lightweight trail groomer |