Assignee
SPERLING RAILWAY SERVICES INC
US·8 granted patents·4 pending applications·90 citations·filing 2002–2024
Top patents by PatentIndex Score
12 records- 0193US6622849B1Hopper door assembly and method for feeding bulk metal objects from a hopperSPERLING RAILWAY SERVICES INC·Filed 2002·Granted Sep 23, 2003·62 cites·20 claims
- 0284US11015299B2Method and apparatus for retrieving and placing tie platesSPERLING RAILWAY SERVICES INC·Filed 2018·Granted May 25, 2021·3 cites·16 claims
- 0382US7926426B2Railway scrap recovery vehicleSPERLING RAILWAY SERVICES INC·Filed 2008·Granted Apr 19, 2011·8 cites·44 claims
- 0479US10982394B2Method and apparatus for retrieving and placing tie platesSPERLING RAILWAY SERVICES INC·Filed 2018·Granted Apr 20, 2021·2 cites·15 claims
- 0578US11015298B2Method and apparatus for retrieving and placing tie platesSPERLING RAILWAY SERVICES INC·Filed 2018·Granted May 25, 2021·2 cites·18 claims
- 0675US11982057B1Method and apparatus for retrieving and placing tie platesSPERLING RAILWAY SERVICES INC·Filed 2020·Granted May 14, 2024·1 cites·20 claims
- 0762US7244089B2Device for removing metallic objects from a railway bedSPERLING RAILWAY SERVICES INC·Filed 2004·Granted Jul 17, 2007·12 cites·33 claims
- 0857US2011132226A1Method and apparatus for cutting railroad railsSPERLING RAILWAY SERVICES INC·Filed 2009·Application pending·0 cites
- 0955US2025354339A1Rail heater and method of useSPERLING RAILWAY SERVICES INC·Filed 2024·Application pending·0 cites
- 1054US2025290254A1Rail grinding machine and method thereofSPERLING RAILWAY SERVICES INC·Filed 2024·Application pending·0 cites
- 1154US2025290255A1Rail grinding machine and method thereofSPERLING RAILWAY SERVICES INC·Filed 2024·Application pending·0 cites
- 1253US12084816B2Method and apparatus for retrieving and placing tie platesSPERLING RAILWAY SERVICES INC·Filed 2020·Granted Sep 10, 2024·0 cites·20 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →