William I. Fletcher
6Patents
0Active
6Granted
27Portfolio score
Filing activity: Aug 14, 1996 → Apr 16, 2004
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6061434A | Video caller identification systems and methods | Electricity | 126 | Expired |
| US6243448A | Video caller identification systems and methods | Electricity | 76 | Expired |
| US6546092B2 | Video caller identification systems and methods | Electricity | 68 | Expired |
| US6731727B2 | Methods for displaying caller identification information on an integrated display/telephone system capable of displaying images | Electricity | 67 | Expired |
| US6427003B1 | Video caller identification systems and methods | Electricity | 66 | Expired |
| US6990181B2 | Methods for displaying caller identification information on an integrated display/telephone system capable of displaying images | Electricity | 3 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.