Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11745963 | Object collecting heads for object collecting systems | Margaret C. Liu, Samuel K. Liu | 2023-09-05 |
| 11414128 | Multiple maneuvering systems for various applications | Margaret C. Liu, Samuel K. Liu | 2022-08-16 |
| 11130519 | Parallel maneuvering system | Margaret C. Liu, Samuel K. Liu | 2021-09-28 |
| 11015664 | Rotation-actuated drum brake | Margaret C. Liu, Samuel K. Liu | 2021-05-25 |
| 10800030 | Mobile work station with versatile tool handler arm | Margaret C. Liu, Samuel K. Liu | 2020-10-13 |
| 10731740 | Multiple small-pitch helical drives in linear and rotary actuators | Margaret C. Liu, Samuel K. Liu | 2020-08-04 |
| 10730729 | Scissor-lift | Margaret C. Liu, Samuel K. Liu | 2020-08-04 |
| 10711870 | Linear-to-rotary actuator | Margaret C. Liu, Samuel K. Liu | 2020-07-14 |
| 10329132 | Elevating lift with a stabilized movable base | Margaret K. Liu, Samuel K. Liu | 2019-06-25 |
| 10308423 | Portable collapsible container | Margaret C. Liu, Samuel K. Liu | 2019-06-04 |
| 10041572 | Radially engaging coupling system | Margaret C. Liu, Samuel K. Liu | 2018-08-07 |
| 10005652 | Elevating lift with a stabilized movable base | Margaret K. Liu, Samuel K. Liu | 2018-06-26 |
| 9789902 | Simultaneous manuvering system for vehicles | Margaret C. Liu, Samuel K. Liu | 2017-10-17 |
| 9701525 | Elevating lift | Margaret C. Liu, Samuel K. Liu | 2017-07-11 |
| 9394926 | Torque converter | Margaret C. Liu, Samuel K. Liu | 2016-07-19 |
| 9303741 | Linear-to-rotary actuator | Margaret C. Liu, Samuel K. Liu | 2016-04-05 |
| 9228649 | Simultaneous actuating mechanism for parallel axis rotors | Margaret C. Liu, Samuel K. Liu | 2016-01-05 |
| 9103419 | Radially engaging system | Margaret C. Liu, Samuel K. Liu | 2015-08-11 |
| 9068634 | Radially engaging system | Margaret C. Liu, Samuel K. Liu | 2015-06-30 |
| 9027423 | Linear-to-rotary actuator | Margaret C. Liu, Samuel K. Liu | 2015-05-12 |
| 8904677 | Locking pin assembly | — | 2014-12-09 |
| 8267222 | Compact scissors lift | — | 2012-09-18 |
| 7950695 | Safety guard mechanism for lifting device | — | 2011-05-31 |
| 5529368 | Umbrella unit attachable to a vehicle | Yan Liu | 1996-06-25 |