Assignee
SPENO INTERNATIONAL
CH·33 granted patents·883 citations·filing 1976–1997
Top patents by PatentIndex Score
33 records- 0195US4531837AMethod for measuring the transverse profile of the head of a rail of a railroad trackSPENO INTERNATIONAL·Filed 1983·Granted Jul 30, 1985·65 cites·17 claims
- 0292US5134808AMethod of programming and performing the reprofiling of rails of a railroad track and railroad vehicle for carrying out the sameSPENO INTERNATIONAL·Filed 1990·Granted Aug 4, 1992·37 cites·15 claims
- 0392US4417466AMeasuring method and device for measuring at least one geometrical characteristic of the head of the rails of a railway trackSPENO INTERNATIONAL·Filed 1981·Granted Nov 29, 1983·48 cites·11 claims
- 0488US5086591AReprofiling method of the rails of a railroad track and railroad vehicle for performing the sameSPENO INTERNATIONAL·Filed 1990·Granted Feb 11, 1992·31 cites·13 claims
- 0587US5566437AInstallation for the reprofiling of tracks carried out on a railway lineSPENO INTERNATIONAL·Filed 1994·Granted Oct 22, 1996·30 cites·16 claims
- 0683US4100795AProcess and a system for measuring and recording undulatory deformations of a rail surfaceSPENO INTERNATIONAL·Filed 1976·Granted Jul 18, 1978·32 cites·17 claims
- 0782US5549505AInstallation for the reprofiling of tracks carried out on a railway lineSPENO INTERNATIONAL·Filed 1994·Granted Aug 27, 1996·27 cites·15 claims
- 0882US4288855ADevice for measuring deformations of the travel surface of the rails of a railwaySPENO INTERNATIONAL·Filed 1980·Granted Sep 8, 1981·36 cites·7 claims
- 0981US5804731AUltrasonic device for measuring the internal defects of a railSPENO INTERNATIONAL·Filed 1997·Granted Sep 8, 1998·62 cites·16 claims
- 1081US4492059AGrinding device for the reprofiling of a rail of a railway trackSPENO INTERNATIONAL·Filed 1983·Granted Jan 8, 1985·42 cites·10 claims
- 1180US5020371ADevice for the precise transverse positioning for a member displaceable along a rail of a railway track with respect to said railSPENO INTERNATIONAL·Filed 1989·Granted Jun 4, 1991·42 cites·10 claims
- 1279US5265379ADevice for the reprofiling of the rails of railway trackSPENO INTERNATIONAL·Filed 1992·Granted Nov 30, 1993·25 cites·10 claims
- 1379US4115857AProcess and apparatus for on-track truing of the heads of rails of a railwaySPENO INTERNATIONAL·Filed 1977·Granted Sep 19, 1978·34 cites·12 claims
- 1473US4615150ADevice for the in situ reprofiling of the head of at least one rail of a railroad trackSPENO INTERNATIONAL·Filed 1985·Granted Oct 7, 1986·31 cites·14 claims
- 1571US4548070AApparatus for measuring undulatory deformations of the rolling surface of railroad railsSPENO INTERNATIONAL·Filed 1983·Granted Oct 22, 1985·22 cites·11 claims
- 1670US5522265ADevice for the ultrasonic measuring of the defects of a railway trackSPENO INTERNATIONAL·Filed 1995·Granted Jun 4, 1996·55 cites·15 claims
- 1767US5574224AProcess and device for the continuous nondestructive control of rails on a railway line by ultrasonicsSPENO INTERNATIONAL·Filed 1995·Granted Nov 12, 1996·34 cites·13 claims
- 1865US4905422AMethod and device for the continuous rectification of the rails of a railway trackSPENO INTERNATIONAL·Filed 1984·Granted Mar 6, 1990·23 cites·19 claims
- 1964US5101358AMethod of programming and performing the reprofiling work of rails of a railroad track and a device to carry out the sameSPENO INTERNATIONAL·Filed 1990·Granted Mar 31, 1992·17 cites·11 claims
- 2064US4993193ARailroad vehicle for reprofiling at least one rail of a railroad trackSPENO INTERNATIONAL·Filed 1989·Granted Feb 19, 1991·25 cites·4 claims
- 2164US4091578AProcess and apparatus for truing the head of rails of a railwaySPENO INTERNATIONAL·Filed 1976·Granted May 30, 1978·20 cites·12 claims
- 2260US5673626AEquipment for cleaning railway tracksSPENO INTERNATIONAL·Filed 1996·Granted Oct 7, 1997·27 cites·16 claims
- 2355US4416091AGrinding device for the continuous and in situ reprofiling of a railroad trackSPENO INTERNATIONAL·Filed 1980·Granted Nov 22, 1983·17 cites·7 claims
- 2451US4920701ADevice for the reprofiling of the rails of a railway trackSPENO INTERNATIONAL·Filed 1989·Granted May 1, 1990·16 cites·8 claims
- 2551US4541182AMeasuring device of the transverse profile of the head of a railSPENO INTERNATIONAL·Filed 1983·Granted Sep 17, 1985·14 cites·17 claims
- 2650US4596092ADevice for the continuous reprofiling of the head of at least one railSPENO INTERNATIONAL·Filed 1984·Granted Jun 24, 1986·13 cites·9 claims
- 2748US4189873AMachine for truing the bearing surface of the rails of a railroad trackSPENO INTERNATIONAL·Filed 1977·Granted Feb 26, 1980·11 cites·2 claims
- 2843US5580301ADevice for fastening a lapping disk to the axle of a motor of a lapping unit used on the rail of a railwaySPENO INTERNATIONAL·Filed 1994·Granted Dec 3, 1996·7 cites·13 claims
- 2942US4020599AAbrading arrangement for a railway trackSPENO INTERNATIONAL·Filed 1976·Granted May 3, 1977·8 cites·7 claims
- 3039US5997391ADevice for the continuous and fine reprofiling in situ of the surface of the head of at least one rail of a railway trackSPENO INTERNATIONAL·Filed 1997·Granted Dec 7, 1999·12 cites·12 claims
- 3139US4878318ARailway track maintenance machine for the rectification of the head of the railSPENO INTERNATIONAL·Filed 1989·Granted Nov 7, 1989·7 cites·3 claims
- 3238US4292768AGrinding toolSPENO INTERNATIONAL·Filed 1979·Granted Oct 6, 1981·4 cites·2 claims
- 3335US5525098AMachine for molding localized sections of a railroad rail, particularly for welding ends of rails or other local defectsSPENO INTERNATIONAL·Filed 1995·Granted Jun 11, 1996·9 cites·4 claims
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