Screw tightening system, controller, and non-transitory storage medium
US-12440933-B2 · Oct 14, 2025 · US
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Liu Zhiqiang patents
Liu Zhiqiang is listed as an inventor on 10 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Liu Zhiqiang |
| Total patents | 10 |
| First publication | Oct 1, 2015 |
| Latest publication | Oct 14, 2025 |
Notable patents
Publications ranked by popularity score, then publication date.
Robot system and method for controlling same
US-12330305-B2 · Jun 17, 2025 · US
Robot system and method for controlling same
US-2023286145-A1 · Sep 14, 2023 · US
Screw tightening system, controller, and non-transitory storage medium
US-2023271282-A1 · Aug 31, 2023 · US
Two-dimensional position encoder
US-11467506-B2 · Oct 11, 2022 · US
Two-dimensional position encoder
US-2021181643-A1 · Jun 17, 2021 · US
Two-dimensional position encoder
US-10921718-B2 · Feb 16, 2021 · US
Two-dimensional position encoder
US-2019187572-A1 · Jun 20, 2019 · US
Minimization of Abbe error caused by tip or tilt between an encoder head and a wafer stage for arbitrary location of a center of rotation
US-9605948-B2 · Mar 28, 2017 · US
Minimization of abbe error caused by tip or tilt between an encoder head and a wafer stage for arbitrary location of a center of rotation
US-2015276385-A1 · Oct 1, 2015 · US
Recent patents
Latest publications not already listed above.
No data yet.
Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Nikon Corp | 6 |
| Omron Tateisi Electronics Co | 4 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| G03F7/70775 | 6 |
| G01D5/38 | 4 |
| G03F7/70516 | 4 |
| G01B11/002 | 4 |
| G01B11/14 | 2 |