Visual Systems, Inc.
4Patents
0Active
4Granted
25Portfolio score
Filing activity: Dec 18, 1978 → Apr 8, 2003
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4219737A | Self regulating microfilm frame detection circuit | Physics | 9 | Expired |
| US7448650B2 | Construction for a book cover | Performing Operations; Transporting | 8 | Expired |
| US4310751A | Microfilm indexing machine | Physics | 2 | Expired |
| US4338519A | Adjustable blip sensor interface for microfilm reader and microfilm reader printers | Physics | 1 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.