Helfrich; Thomas E.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Helfrich; Thomas E..The latest application filed is for "uninterruptible power supply with improved output regulation".
- Helfrich; Thomas E. - Santa Ana CA
| Patent | Date |
|---|---|
| Uninterruptible power supply with improved output regulation Grant 5,465,011 - Miller , et al. November 7, 1 | 1995-11-07 |
| Method of phase synchronization between two AC signals Grant 5,461,263 - Helfrich October 24, 1 | 1995-10-24 |
| SEC | 0001232423 | HELFRICH THOMAS E |
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