Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D1051710 | Rivet nut | — | 2024-11-19 |
| 11555562 | Pre-stressed concrete pipe | — | 2023-01-17 |
| 11471930 | Molding die structure for forming oblique teeth on a rivet nut | — | 2022-10-18 |
| 11402011 | Transmission mechanism with monitoring function | Zong-Sian Jiang | 2022-08-02 |
| 9657820 | Ball screw with maintenance device | Chin-Wen Hsieh, Shang-Hua Tsai, Ren-Yuan Chen, Zong-Sian Jiang | 2017-05-23 |
| 9091336 | Circulating element for ball screw and ball screw using the circulating element | Ming-Yao Lin | 2015-07-28 |
| 8544505 | Pre-stressed concrete pipe | — | 2013-10-01 |
| 8519428 | Vertical stacked light emitting structure | Chi-Hsing Hsu, Chun-Yu Lu | 2013-08-27 |
| 8476651 | Vertical stacked light emitting structure | Chi-Hsing Hsu, Chun-Yu Lu | 2013-07-02 |
| 8023203 | Miniature three-piece optical imaging lens with short back focal length | San-Woei Shyu, Bo-Yuan Shih | 2011-09-20 |
| 8009368 | Aspherical fiber coupling lens | — | 2011-08-30 |
| 6183557 | Air bellow suspended pipe lining machine | — | 2001-02-06 |
| 6076562 | Pre-stressed concrete pipe | — | 2000-06-20 |
| 5785092 | High-pressure fiber reinforced composite pipe joint | Ralph Friedrich, Kevin Smyth | 1998-07-28 |
| 5714080 | Self-actuating molds for vertically casting concrete pipe | Paul Kubat | 1998-02-03 |
| 5520422 | High-pressure fiber reinforced composite pipe joint | Ralph Friedrich, Kevin Smyth | 1996-05-28 |
| 5251421 | Prestress wire splicing apparatus | Ralph Friedrich, Danny I. Wang | 1993-10-12 |