Rotary wheel airtightness detecting machine
US-9562831-B2 · Feb 7, 2017 · US
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Changhai Li patents
Changhai Li is listed as an inventor on 6 patents in our database. Major assignees and classification codes are summarized below.
| Metric | Value |
|---|---|
| Inventor | Changhai Li |
| Total patents | 6 |
| First publication | Sep 10, 2015 |
| Latest publication | Feb 7, 2017 |
Notable patents
Publications ranked by popularity score, then publication date.
Apparatus for detecting spring stiffness
US-9470613-B2 · Oct 18, 2016 · US
Casting equipment
US-2015273576-A1 · Oct 1, 2015 · US
Rotary wheel airtightness detecting machine
US-2015276542-A1 · Oct 1, 2015 · US
Apparatus for detecting spring stiffness
US-2015260623-A1 · Sep 17, 2015 · US
Method for improving mechanical properties of aluminum alloy castings
US-2015252460-A1 · Sep 10, 2015 · US
Recent patents
Latest publications not already listed above.
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Major assignees
Companies most often associated with this inventor's publications.
| Assignee | Patents |
|---|---|
| Citic Dicastal Co Ltd | 8 |
Top CPC classifications
Most common classification codes across this inventor's patents.
| CPC | Patents |
|---|---|
| G01M17/021 | 2 |
| G01M3/103 | 2 |
| G01N2203/0288 | 2 |
| G01N3/08 | 2 |
| B22D27/00 | 1 |