Pandrol Limited
🏢 View company profile →78Patents
33Active
78Granted
42Portfolio score
Filing activity: Sep 12, 1975 → Sep 26, 2019 · 14 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4068593A | Driving of rail clips in making a railway rail-and-fastening assembly | Fixed Constructions | 24 | Expired |
| US5520330A | Railway rail-fastening clip and assembly and methods of employing the same | Fixed Constructions | 24 | Expired |
| US4771944A | Rail pads and rail assemblies including such pads | Fixed Constructions | 21 | Expired |
| US4319392A | Removing rail clips from a railway track | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4756477A | Plate for supporting railway rails and a track assembly using it | Fixed Constructions | 16 | Expired |
| US4971247A | Pad for placing under a railway rail and a rail-and-fastening assembly including the pad | Fixed Constructions | 15 | Expired |
| US5735458A | Fastening railway rails | Fixed Constructions | 14 | Expired |
| US5678762A | Railway rail fastening assemblies including resilient railway rail fastening clips and associated insulators | Fixed Constructions | 13 | Expired |
| US5195679A | Rail pads | Fixed Constructions | 13 | Expired |
| US4466569A | Anchoring a railway rail-fastening clip to a foundation for a railway rail | Fixed Constructions | 13 | Expired |
| US4757945A | Electrically insulating device for use on a railway track under and beside the foot of a rail | Fixed Constructions | 12 | Expired |
| US4349151A | Holding a railway rail down on a support member | Fixed Constructions | 12 | Expired |
| US5566882A | Railway rail-fastening clip and assembly and methods of employing the same | Fixed Constructions | 12 | Expired |
| US6761322B1 | Railway baseplate assembly | Fixed Constructions | 12 | Expired |
| US4141500A | Railway tie plate and a method of making a railway tie plate | Emerging Cross-Sectional Technologies | 12 | Expired |
| US7648080B2 | Rail fixing device | Fixed Constructions | 11 | Active |
| US4479440A | Rail clip driving apparatus | Fixed Constructions | 11 | Expired |
| US4073435A | Railway rail-fastening clip and a railway rail-and-fastening assembly employing it | Fixed Constructions | 11 | Expired |
| US5261599A | Rail pads | Fixed Constructions | 11 | Expired |
| US7080791B2 | Abrasion assembly for supporting railroad ties | Fixed Constructions | 9 | Expired |
| US4104483A | Device suitable for use in a railway rail-and-fastening assembly to insulate a rail from a rail clip and from an anchorage for the clip | Fixed Constructions | 9 | Expired |
| US4513912A | Holding a railway rail down on a support member | Fixed Constructions | 9 | Expired |
| US7690584B2 | Fastener for supporting railroad ties | Fixed Constructions | 9 | Active |
| US4350291A | Railway rail-fastening clip and a railway rail-and-fastening assembly | Fixed Constructions | 9 | Expired |
| US4461422A | Railway spike and an assembly on a railway track incorporating the spike | Fixed Constructions | 8 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.