Northern Engineering Industries plc
39Patents
0Active
39Granted
38Portfolio score
Filing activity: Dec 8, 1977 → Apr 1, 1994
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4583413A | Toothed gear system | Emerging Cross-Sectional Technologies | 66 | Expired |
| US4511807A | Electrical generator control system | Emerging Cross-Sectional Technologies | 44 | Expired |
| US4320568A | Method of expanding tubular members | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4930430A | Burners | Mechanical Engineering; Lighting; Heating | 29 | Expired |
| US5193049A | Enclosures for electrical switchgear | Electricity | 26 | Expired |
| US4894573A | Rotary electrical machines | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4193510A | Liquid storage tank | Performing Operations; Transporting | 16 | Expired |
| US5087230A | Drive transmissions | Performing Operations; Transporting | 15 | Expired |
| US4298696A | Regeneration of ion exchange materials | Performing Operations; Transporting | 14 | Expired |
| US4503302A | Arc interrupter | Electricity | 12 | Expired |
| US4272706A | Mooring winch system | Performing Operations; Transporting | 12 | Expired |
| US4980528A | Arc interrupter | Electricity | 11 | Expired |
| US4752659A | Arc interrupter | Electricity | 10 | Expired |
| US5191991A | Housings with safety pressure relief means thereon | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4425087A | Pressure equalizing device and deep well motor/pump combination | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US4790480A | Liquid fuel atomiser | Performing Operations; Transporting | 10 | Expired |
| US5083989A | Drive transmissions | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US4434723A | Fluidized-bed combustion apparatus | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US4347414A | Arc shorting device | Electricity | 9 | Expired |
| US4577128A | Induction motors | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4764123A | Electrical connectors | Electricity | 7 | Expired |
| US4516728A | Liquid fuel atomizer | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US4343170A | Apparatus for expanding tubular members | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4383046A | Regeneration of ion exchange materials | Performing Operations; Transporting | 6 | Expired |
| US4442229A | Regeneration of ion exchange materials | Performing Operations; Transporting | 5 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.