Gullick Dobson Limited
19Patents
0Active
19Granted
30Portfolio score
Filing activity: Mar 21, 1975 → Mar 9, 1994
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5029943A | Apparatus for transmitting data | Fixed Constructions | 18 | Expired |
| US5039257A | Mine roof supports | Fixed Constructions | 11 | Expired |
| US5423638A | Mine roof supports | Fixed Constructions | 10 | Expired |
| US4134270A | Mine roof support control | Fixed Constructions | 8 | Expired |
| US4050256A | Mine roof support control systems | Fixed Constructions | 8 | Expired |
| US4953692A | Drive frame for a scraper chain conveyor | Performing Operations; Transporting | 5 | Expired |
| US4041714A | Mine roof supports | Fixed Constructions | 5 | Expired |
| US3991580A | Mine roof supports | Fixed Constructions | 4 | Expired |
| US5145235A | Measurement of the alignment of an articulated mine conveyor | Physics | 4 | Expired |
| US4797023A | Mine roof supports | Fixed Constructions | 3 | Expired |
| US4102140A | Self-advancing mine roof supports | Fixed Constructions | 3 | Expired |
| US4784532A | Mine roof supports | Fixed Constructions | 3 | Expired |
| US4002036A | Mine roof supports | Fixed Constructions | 2 | Expired |
| US4941807A | Hydraulic power generating pack | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US3991578A | Self-advancing mine roof supports | Fixed Constructions | 1 | Expired |
| US4792261A | Mine roof supports | Fixed Constructions | 1 | Expired |
| US4062194A | Mine roof supports | Fixed Constructions | 1 | Expired |
| US4141594A | Manipulable tool mount | Fixed Constructions | 0 | Expired |
| US4799510A | Valve for use in controlling the functions of mine roof supports | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.