Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5675091 | Step-wise tracking electronic filter with offset up and down transition | Hyok S. Lew, Yon S. Lew | 1997-10-07 |
| 5591923 | Electroic filter for flowmeters with compound controls | Hyok S. Lew, Yon S. Lew | 1997-01-07 |
| 5440926 | Folding-unfolding rotary vane meter-motor-pump | Hyok S. Lew, Yon K. Lew | 1995-08-15 |
| 5435188 | Electronic filter for flowmeters with compound controls | Hyok S. Lew, Yon S. Lew | 1995-07-25 |
| 5419189 | Method for obtaining zero flowmeter reading for zero flow | Hyok S. Lew, Yon S. Lew | 1995-05-30 |
| 5269668 | Folding-unfolding rotating flap meter-motor-pump | Hyok S. Lew, Yon K. Lew | 1993-12-14 |
| 5247836 | Convective electric current flowmeter | Hyok S. Lew, Yon K. Lew | 1993-09-28 |
| 5029669 | Rope climbing and sliding device | Yon K. Lew, Hyok S. Lew | 1991-07-09 |
| 4872360 | Moving cylinder actuator | Hyok S. Lew | 1989-10-10 |
| 4793436 | Push-pull sky-ride vertical mobility device | Hyok S. Lew, Yon K. Lew | 1988-12-27 |
| 4702348 | Sky-ride vertical mobility system | Hyok S. Lew, Yon K. Lew | 1987-10-27 |
| 4679656 | Sky-ride vertical mobility device | Hyok S. Lew, Yon K. Lew | 1987-07-14 |
| 4601474 | Self-retrieving attack ball | Hyok S. Lew, Yon K. Lew | 1986-07-22 |
| 4598792 | Sky-ride vertical mobility system | Hyok S. Lew, Yon K. Lew | 1986-07-08 |
| 4598793 | Sky-ride emergency escape system | Hyok S. Lew, Yon K. Lew | 1986-07-08 |
| 4582342 | Pediroller board | Yon K. Lew, Yon S. Lew | 1986-04-15 |