BEEPCARD LTD
10Patents
1Active
10Granted
39Portfolio score
Filing activity: Sep 16, 1998 → Nov 18, 2008 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6607136B1 | Physical presence digital authentication system | Physics | 577 | Expired |
| US7260221B1 | Personal communicator authentication | Electricity | 154 | Expired |
| US7383297B1 | Method to use acoustic signals for computer communications | Physics | 153 | Expired |
| US7706838B2 | Physical presence digital authentication system | Physics | 94 | Expired |
| US7334735B1 | Card for interaction with a computer | Physics | 93 | Expired |
| US7183929B1 | Control of toys and devices by sounds | Human Necessities | 79 | Expired |
| US7568963B1 | Interactive toys | Physics | 59 | Expired |
| US7280970B2 | Sonic/ultrasonic authentication device | Electricity | 54 | Expired |
| US7941480B2 | Computer communications using acoustic signals | Physics | 23 | Active |
| US7480692B2 | Computer communications using acoustic signals | Physics | 6 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.