Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7168180 | Self-powered rotary optical aligning apparatus | Ming-Chun Hu | 2007-01-30 |
| 7135654 | Angle-variable optical marking apparatus | — | 2006-11-14 |
| 6568094 | Compact optical calibrating apparatus for multiple orientations | — | 2003-05-27 |
| 6178649 | Optical calibrating apparatus for emitting datum laser line | — | 2001-01-30 |
| 6108919 | Automatic optical plumbing instrument | Lin Chin Hsiung | 2000-08-29 |
| 6035540 | Automatic optical levelling, plumbing, and verticality-determining apparatus | Lin Chin Hsiung | 2000-03-14 |
| 5983510 | Three-dimensional laser levelling and angle-calibrating instrument with multiple functions | Chih-Hsiung Lin | 1999-11-16 |
| 5239761 | Multiple-purpose measuring instrument | Chih-Jen Hsu | 1993-08-31 |
| 4717032 | Bottle with self-contained pickup tool | — | 1988-01-05 |
| 4656752 | Precise-reading angular level | — | 1987-04-14 |