HDI INSTRUMENTATION
4Patents
0Active
4Granted
30Portfolio score
Filing activity: Sep 22, 1997 → Oct 19, 2001
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6134011A | Optical measurement system using polarized light | Physics | 75 | Expired |
| US6515745B2 | Optical measurement system using polarized light | Physics | 63 | Expired |
| US6307627A | Optical measurement system using polarized light | Physics | 51 | Expired |
| US5898181A | Thin film optical measurement system | Physics | 12 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.