Wing K. Ho
33Patents
10h-index
42Co-inventors
75Inventor score
Filing activity: Jul 2, 1992 → Aug 21, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5313192A | Deactivatable/reactivatable magnetic marker having a step change in magnetic flux | Physics | 42 | Expired |
| US5565849A | Self-biased magnetostrictive element for magnetomechanical electronic article surveillance systems | Electricity | 30 | Expired |
| US5351033A | Semi-hard magnetic elements and method of making same | Electricity | 27 | Expired |
| US5801630A | Article surveillance magnetic marker having an hysteresis loop with large barkhausen discontinuities at a low field threshold level | Electricity | 24 | Expired |
| US7215250B2 | Proximity detaching for electronic article surveillance tags | Fixed Constructions | 23 | Expired |
| US6057766A | Iron-rich magnetostrictive element having optimized bias-field-dependent resonant frequency characteristic | Electricity | 17 | Expired |
| US6011474A | Multiple-use deactivation device for electronic article surveillance markers | Physics | 14 | Expired |
| US5519379A | Multi-thread re-entrant marker with simultaneous switching | Physics | 12 | Expired |
| US5969612A | Stabilizing the position of an active element in a magnetomechanical EAS marker | Physics | 11 | Expired |
| US5835016A | Multi-thread re-entrant marker with transverse anisotropy flux concentrators | Physics | 10 | Expired |
| US6489891B1 | Apparatus for electronic article surveillance tag pollution reduction | Physics | 10 | Expired |
| US8717145B2 | RFID portal system with RFID tags having various read ranges | Physics | 10 | Active |
| US5940362A | Disc device having a magnetic layer overweighing the information signal pattern for electronic article surveillance | Physics | 9 | Expired |
| US7986241B2 | Combination security tag using a perimeter RFID antenna surrounding an EAS element and method thereof | Electricity | 9 | Active |
| US7536884B2 | Identification/surveillance device with removable tack button | Emerging Cross-Sectional Technologies | 9 | Expired |
| US7391327B2 | Magnetic detacher with open access | Emerging Cross-Sectional Technologies | 9 | Expired |
| US8978427B2 | Tamper resistant security tag | Emerging Cross-Sectional Technologies | 6 | Active |
| US8833652B2 | Product information system and method using a tag and mobile device | Physics | 6 | Active |
| US8529831B1 | System and method for air purification using an enhanced multi-functional coating based on in-situ photocatalytic oxidation and ozonation | Mechanical Engineering; Lighting; Heating | 6 | Active |
| US5926095A | Transverse field annealing process to form E.A.S. marker having a step change in magnetic flux | Electricity | 6 | Expired |
| US8912904B2 | Security tag having magnetically releasable latch | Emerging Cross-Sectional Technologies | 5 | Active |
| US5949334A | Magnetostrictive element having optimized bias-field-dependent resonant frequency characteristic | Emerging Cross-Sectional Technologies | 5 | Expired |
| US7576654B2 | Magnetic detacher with open access | Emerging Cross-Sectional Technologies | 5 | Active |
| US8054185B2 | Optimization of the field profile on a high field strength magnetic detacher | Electricity | 4 | Active |
| US6023226A | EAS marker with flux concentrators having magnetic anisotropy oriented transversely to length of active element | Emerging Cross-Sectional Technologies | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.