Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5595672 | Automatic power interrupting apparatus for an electric appliance | John C. K. Sham | 1997-01-21 |
| 5463205 | Photosensitive switching apparatus for an electric appliance | John C. K. Sham | 1995-10-31 |