SG, LLC
33Patents
3Active
33Granted
43Portfolio score
Filing activity: Oct 14, 1981 → Mar 24, 2023
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4764767A | Absolute rotational position detection device | Electricity | 86 | Expired |
| US4717874A | Reluctance type linear position detection device | Performing Operations; Transporting | 64 | Expired |
| US4743786A | Rotational position detection device | Physics | 41 | Expired |
| US4556886A | Phase shift type linear position detection device | Physics | 41 | Expired |
| US4754220A | Digital output rotational position detection device | Physics | 36 | Expired |
| US4604575A | Multiple output rotational position detection device | Physics | 34 | Expired |
| US6827640B2 | Portable dust collection system | Performing Operations; Transporting | 33 | Expired |
| US4951048A | Absolute linear position detection device | Electricity | 31 | Expired |
| US5252902A | Servo control system | Physics | 28 | Expired |
| US4804913A | Positioning control system for a fluid powered cylinder | Physics | 27 | Expired |
| US4572951A | System for detecting an absolute position | Physics | 25 | Expired |
| US5194709A | Method for checking a spot welded portion and spot welding machine | Performing Operations; Transporting | 24 | Expired |
| US4879555A | Absolute linear position detection device | Electricity | 23 | Expired |
| US4651073A | Positioning control device for an electric motor | Physics | 20 | Expired |
| US5412172A | Spot welding machine | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US4612503A | Rotation speed detection device having a rotation angle detector of inductive type | Physics | 15 | Expired |
| US5382899A | Position detecting and time measuring device providing measurement finer than a clock signal period | Physics | 14 | Expired |
| US4731523A | Bill receiving device | Physics | 13 | Expired |
| US5252900A | Harmonization control system for plural shafts | Physics | 13 | Expired |
| US5202611A | Synchronization control system for servo motors | Physics | 13 | Expired |
| US5142226A | Position detection device having absolute position detection apparatus and interpolation apparatus | Physics | 11 | Expired |
| US5349293A | Conductive rotational position detection device having stator and rotor | Physics | 8 | Expired |
| US4831318A | Positioning control system | Physics | 7 | Expired |
| US5006798A | Position detection using reluctance changes induced by displacement of metallic balls | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US4695235A | Bag-cylinder control device in a tire vulcanizer | Performing Operations; Transporting | 4 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.