HF Systems, Incorporated
1Patents
0Active
1Granted
24Portfolio score
Filing activity: Sep 22, 1977 → Sep 22, 1977
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4185278A | Obscuration type smoke detector | Physics | 27 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.