Northern Research & Engineering Corp.
32Patents
0Active
32Granted
37Portfolio score
Filing activity: Jun 4, 1975 → Dec 7, 1999
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4212585A | Centrifugal compressor | Mechanical Engineering; Lighting; Heating | 74 | Expired |
| US5450724A | Gas turbine apparatus including fuel and air mixer | Mechanical Engineering; Lighting; Heating | 47 | Expired |
| US4040251A | Gas turbine combustion chamber arrangement | Mechanical Engineering; Lighting; Heating | 42 | Expired |
| US4340317A | Splineless coupling means | Mechanical Engineering; Lighting; Heating | 34 | Expired |
| US5316261A | Fluid conduit having a variable inner diameter | Physics | 33 | Expired |
| US5215439A | Arbitrary hub for centrifugal impellers | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5324175A | Pneumatically operated reciprocating piston compressor | Mechanical Engineering; Lighting; Heating | 28 | Expired |
| US5997242A | Hydraulic turbine | Emerging Cross-Sectional Technologies | 27 | Expired |
| US6039534A | Inlet guide vane assembly | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US5609655A | Gas turbine apparatus | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US5122966A | Computer generated tool path interference check method | Physics | 24 | Expired |
| US5564270A | Gas turbine apparatus | Mechanical Engineering; Lighting; Heating | 23 | Expired |
| US5992139A | Turbine engine with turbocompressor for supplying atomizing fluid to turbine engine fuel system | Emerging Cross-Sectional Technologies | 21 | Expired |
| USD355253S | Impeller for refrigerant compressors | General | 19 | Expired |
| US5586429A | Brayton cycle industrial air compressor | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US4038815A | Gas turbine | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US5426986A | Absorption dynamometer torque measuring device and calibration method | Physics | 10 | Expired |
| US5391024A | Method for multi-criteria flank milling of ruled surfaces | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4744724A | Absorption dynamometer | Physics | 9 | Expired |
| US5345827A | Absorption dynamometer and torque measurement therefor | Physics | 9 | Expired |
| US5353597A | Inlet air cooling system | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5259196A | Inlet air cooling system | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5107436A | Method for generating a tool course for a cutting tool | Physics | 8 | Expired |
| US4526199A | Valve for throttling fluid | Emerging Cross-Sectional Technologies | 6 | Expired |
| US5509315A | Absorption dynamometer torque measuring device and calibration method | Physics | 4 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.