Li; Hung J.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Li; Hung J..The latest application filed is for "sudden, pressure relay supervisory apparatus".
- Li; Hung J. - Coral Springs FL
| Patent | Date |
|---|---|
| Sudden, pressure relay supervisory apparatus Grant 4,903,160 - Elmore , et al. February 20, 1 | 1990-02-20 |
| Directional comparison blocking protective relay system Grant 4,896,241 - Li , et al. January 23, 1 | 1990-01-23 |
| Loss-of-potential supervision for a distance relay Grant 4,835,651 - Li , et al. May 30, 1 | 1989-05-30 |
| Transformer differential relay with speed-up apparatus Grant 4,704,653 - Li November 3, 1 | 1987-11-03 |
| Protective relay apparatus and method for providing single-pole tripping Grant 4,536,815 - Li , et al. August 20, 1 | 1985-08-20 |
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