VA, Inc.
19Patents
11Active
19Granted
39Portfolio score
Filing activity: Sep 2, 1983 → Oct 1, 2013 · 7 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6652165B1 | Damping system for mechanical shutter | Physics | 16 | Expired |
| US8333521B2 | Shutter assembly with rotating magnet | Physics | 12 | Active |
| US4884160A | Constant current actuator for inductive load | Electricity | 8 | Expired |
| US4697221A | Portable actuator for inductive load | Electricity | 7 | Expired |
| US7883280B2 | Shutter activation system | Physics | 4 | Active |
| US7845865B2 | Non contact shutter activation system and method | Physics | 4 | Active |
| US8317417B2 | Shutter damping assembly | Physics | 2 | Active |
| US7334950B2 | Quick-change shutter assembly | Electricity | 2 | Expired |
| US7513702B2 | Non-contact shutter activation system and method | Physics | 2 | Expired |
| US8313255B2 | Shutter assembly with drive ring-mounted magnet | Physics | 2 | Active |
| US4513345A | Control circuit for inductive load | Electricity | 2 | Expired |
| US7367721B2 | Bi-stable mechanical photographic shutter | Physics | 1 | Expired |
| US8128296B2 | Shutter assembly | Physics | 1 | Active |
| US8322935B2 | Shutter activation system | Physics | 1 | Active |
| US7614806B2 | Damping system for mechanical shutter | Physics | 1 | Expired |
| US8651754B2 | Electromagnetic shutter | Physics | 0 | Active |
| US8439581B2 | Shutter assembly | Physics | 0 | Active |
| US8727645B2 | Shutter assembly with drive ring-mounted magnet | Physics | 0 | Active |
| US8783978B2 | Shutter having magnet-driven drive ring | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.