| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Optics | |
| #3 | Environmental technology | |
| #4 | Machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Crawford James J | 9 |
| #2 | Frezzolini James | 5 |
| #3 | Frezzolini J | 1 |
| #4 | Crawford J | 1 |
| #5 | Crawford Kevin J | 1 |
| #6 | Frezzolini James A | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US5994844A | Video lighthead with dimmer control and stabilized intensity | |
| US4965462A | Stand-by power supply | |
| US4346336A | Battery control system | |
| US4282476A | Variable pressure control switch for battery charging circuit | |
| US3920318A | Film drive assembly | |
| US3931630A | Viewfinder assembly | |
| US3946260A | Motor construction | |
| US3656045A | Battery protection circuit | |
| US3708738A | Battery charging and discharging apparatus | |
| US3609506A | Battery apparatus | |
| CA887289A | Battery apparatus |