Masato Hata
22Patents
9h-index
28Co-inventors
75Inventor score
Filing activity: Jun 12, 1991 → Oct 16, 2013
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5581297A | Low power video security monitoring system | Electricity | 60 | Expired |
| US5291548A | Distributed telephone conference control device | Electricity | 47 | Expired |
| US6188428A | Transcoding video file server and methods for its use | Electricity | 41 | Expired |
| US5313297A | System for providing pictures responding to users' remote control | Electricity | 41 | Expired |
| USD408384S | Dongle type computer accessory | General | 39 | Expired |
| US5365576A | Data and speech transmission device | Electricity | 29 | Expired |
| US5644355A | Adaptive video subscriber system and methods for its use | Electricity | 25 | Expired |
| US6087755A | Radial gap type cylindrical motor | Electricity | 24 | Expired |
| US9331854B2 | Message authentication method in communication system and communication system | Electricity | 19 | Active |
| US5299258A | Information input/output controller for telephone lines | Electricity | 7 | Expired |
| US5594730A | Data distribution system and methods for its use | Electricity | 5 | Expired |
| US6737782B2 | Electric rotary machine having bobbins with thin-walled extensions of flange | Electricity | 5 | Expired |
| US7196444B2 | Stepping motor for use in high-temperature environments | Electricity | 3 | Expired |
| US6717319B2 | Electric rotary machine with armature of discrete salient pole structure | Electricity | 2 | Expired |
| US8050931B2 | Sound masking system and masking sound generation method | Electricity | 2 | Active |
| US8861742B2 | Masker sound generation apparatus and program | Electricity | 1 | Active |
| US9318933B2 | Stepping motor with snapping front boss and securing pins | Electricity | 1 | Active |
| US8957554B2 | Stepping motor with position regulation member | Electricity | 1 | Active |
| US8271288B2 | Sound masking system and masking sound generation method | Electricity | 1 | Active |
| US9461518B2 | Stepping motor | Electricity | 1 | Active |
| US9263922B2 | Stepping motor having a band holding two stator end plates | Electricity | 1 | Active |
| US9390703B2 | Masking sound generating apparatus, storage medium stored with masking sound signal, masking sound reproducing apparatus, and program | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.