Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7476984 | Spring activated energy transducer generating A/C electricity from reciprocating natural forces | Hyun Bong Kim, Michelle Lee, Sung Ki Kim, Jung Ki Kim | 2009-01-13 |
| 7304398 | Spring activated energy transducer generating A/C electricity from natural forces-frictionless magnetic plate | Hyun Bong Kim, Michelle Lee, Sung Ki Kim, Jung Ki Kim | 2007-12-04 |