Oy Helvar
Patent Applications and Registrations
Patent applications and USPTO patent grants for Oy Helvar.The latest application filed is for "method and apparatus for wireless remote control".
- Oy Helvar - FI FI
- Oy Helvar - Helsinski FI
- Oy; Helvar - Helsinki FI
Trademarks
| Patent | Date |
|---|---|
| Method and apparatus for wireless remote control Grant 5,844,516 - Viljanen December 1, 1 | 1998-12-01 |
| Control device for an appliance consuming electric power Grant 5,552,676 - Viljanen September 3, 1 | 1996-09-03 |
| Control circuit for drive circuit of an electronic ballast for a discharge lamp Grant 5,410,220 - von Hertzen April 25, 1 | 1995-04-25 |
| Electronic mains connection device for a gas discharge lamp Grant 4,719,390 - Sairanen January 12, 1 | 1988-01-12 |
| Intensity regulator, especially a light regulator Grant 4,456,855 - Sairanen June 26, 1 | 1984-06-26 |
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