STEMCO CO., LTD.
48Patents
28Active
48Granted
49Portfolio score
Filing activity: Sep 2, 1980 → Sep 1, 2023 · 5 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4690245A | Flattened venturi, method and apparatus for making | Mechanical Engineering; Lighting; Heating | 59 | Expired |
| US5752746A | Hubcap with vented closure | Performing Operations; Transporting | 50 | Expired |
| US5328275A | Unitized wheel hub and bearing assembly | Mechanical Engineering; Lighting; Heating | 47 | Expired |
| US5860708A | Contaminant excluding hubcap vent plug | Performing Operations; Transporting | 39 | Expired |
| US5785390A | Vented hubcap | Mechanical Engineering; Lighting; Heating | 36 | Expired |
| US4361206A | Exhaust muffler including venturi tube | Mechanical Engineering; Lighting; Heating | 31 | Expired |
| US9440688B2 | Rear-mounted retractable aerodynamic structure for cargo bodies | Emerging Cross-Sectional Technologies | 27 | Active |
| USD749482S1 | Hub cap | General | 22 | Active |
| US9440689B1 | Aerodynamic structures secured to the underbody of cargo bodies | Performing Operations; Transporting | 21 | Active |
| US6170833A | Hub seal with machinable thrust ring and lay-down sealing lip | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US9457847B2 | Rear-mounted aerodynamic structures for cargo bodies | Performing Operations; Transporting | 20 | Active |
| US6776261B2 | Lubricant monitoring system | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US5997005A | Hub seal with machinable thrust ring | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US8403611B2 | Single piece nut assembly | Mechanical Engineering; Lighting; Heating | 17 | Active |
| US5904427A | Unitized wheel hub and bearing assembly with lubricant distributing vanes | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US6845986B2 | Low torque seal assembly | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US4989222A | Electronic hubodometer | Physics | 15 | Expired |
| US9346496B2 | Aerodynamic drag reducing apparatus | Performing Operations; Transporting | 14 | Active |
| US5478642A | Resin-based friction material comprising aramid, acrylic and carbon fibers in a phenolic resin binder | Emerging Cross-Sectional Technologies | 14 | Expired |
| US8352210B2 | Multiple accelerometer apparatus for counting rotations of an object, and methods of use | Physics | 13 | Active |
| US7811038B2 | Self-locking nut | Mechanical Engineering; Lighting; Heating | 13 | Active |
| US6200037A | Lubricant distributing vanes for unitized wheel hub and bearing assembly | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US9221308B2 | Central tire inflation system rotary air union | Performing Operations; Transporting | 9 | Active |
| US8981919B2 | Wireless proportional flow indication for a tire inflation system | Performing Operations; Transporting | 9 | Active |
| US7710239B2 | Remote communication device and system for communication | Physics | 9 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.