Luidia Inc.
18Patents
10Active
18Granted
40Portfolio score
Filing activity: Oct 21, 1998 → Dec 23, 2011 · 5 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| USD595718S1 | Pen | General | 47 | Expired |
| USD618681S1 | Receiver | General | 37 | Expired |
| US7525050B1 | Interference removal in pointing device locating systems | Physics | 26 | Active |
| US6731270B2 | Piezoelectric transducer for data entry device | Physics | 17 | Expired |
| US6841742B2 | Presentation board digitizer systems | Physics | 17 | Expired |
| US6822641B2 | Presentation board digitizer systems | Physics | 14 | Expired |
| US8487915B1 | Mobile device incorporating projector and pen-location transcription system | Electricity | 12 | Active |
| US8064290B2 | Digital transcription system utilizing small aperture acoustical sensors | Physics | 6 | Active |
| US8110757B1 | Interference removal in pointing device locating systems | Physics | 3 | Active |
| US8085249B2 | Pre-assembled part with an associated surface convertible to a transcription apparatus | Physics | 3 | Active |
| US6875933B2 | Methods and apparatus for configuring a writing surface | Physics | 2 | Expired |
| US7221355B1 | Pointing device for a pen locator system including low standby power electronic circuit | Physics | 2 | Expired |
| US8324517B2 | Pen transcription system utilizing a spatial filter for limiting interference | Physics | 2 | Active |
| US8120994B2 | Digital transcription system utilizing acoustical detectors having apertures with a vertical orientation relative to the work surface | Physics | 1 | Active |
| US6786102B2 | Ultrasound speed measurement of temperature and pressure | Physics | 1 | Expired |
| US8884171B2 | Pen transcription system with improved noise rejection | Physics | 0 | Active |
| US8339375B2 | Pre-assembled part with an associated surface convertible to a transcription apparatus | Physics | 0 | Active |
| US8641197B2 | Acoustical receiver and pen transcription system adapted for rejecting virtual pen images | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.