DEW ENGINEERING AND DEVELOPMENT ULC
75Patents
13Active
75Granted
42Portfolio score
Filing activity: Nov 13, 1990 → May 16, 2018 · 11 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5872834A | Telephone with biometric sensing device | Electricity | 399 | Expired |
| US5995630A | Biometric input with encryption | Electricity | 256 | Expired |
| US5987155A | Biometric input device with peripheral port | Physics | 246 | Expired |
| US6160903A | Method of providing secure user access | Physics | 216 | Expired |
| US5991431A | Mouse adapted to scan biometric data | Physics | 180 | Expired |
| US5755748A | Transcutaneous energy transfer device | Human Necessities | 172 | Expired |
| US5717777A | Longest line method and apparatus for fingerprint alignment | Physics | 157 | Expired |
| US5995874A | Transcutaneous energy transfer device | Human Necessities | 154 | Expired |
| US5867802A | Biometrically secured control system for preventing the unauthorized use of a vehicle | Physics | 141 | Expired |
| US6430444B1 | Transcutaneous energy transfer device | Human Necessities | 134 | Expired |
| US5920384A | Optical imaging device | Physics | 134 | Expired |
| US6038334A | Method of gathering biometric information | Physics | 124 | Expired |
| US6052468A | Method of securing a cryptographic key | Electricity | 122 | Expired |
| US6333989A | Contact imaging device | Physics | 117 | Expired |
| US6076167A | Method and system for improving security in network applications | Electricity | 110 | Expired |
| US6058330A | Transcutaneous energy transfer device | Human Necessities | 106 | Expired |
| US5778089A | Driver circuit for a contact imaging array | Physics | 91 | Expired |
| US5859420A | Optical imaging device | Physics | 81 | Expired |
| US5907627A | Contact imaging device | Electricity | 76 | Expired |
| US5680205A | Fingerprint imaging apparatus with auxiliary lens | Physics | 65 | Expired |
| US6072891A | Method of gathering biometric information | Physics | 54 | Expired |
| US6259805A | Biometric security encryption system | Physics | 53 | Expired |
| US5822445A | Apparatus for identifying fingerprints | Physics | 49 | Expired |
| USD425881S | Combined card reader and fingerprint scanner | General | 38 | Expired |
| US6215874A | Random number generator and method for same | Physics | 29 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.