Helmets Limited
6Patents
0Active
6Granted
28Portfolio score
Filing activity: Nov 23, 1977 → Sep 25, 1992
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4730612A | Helmet with auxiliary, electrically operated service | Human Necessities | 47 | Expired |
| US4907300A | Helmet and visor mechanism therefor | Human Necessities | 46 | Expired |
| US5324460A | Method of making a helmet liner | Human Necessities | 41 | Expired |
| US4199823A | Disengageable helmet visor clamp | Human Necessities | 21 | Expired |
| US5329642A | Helmets | Human Necessities | 21 | Expired |
| US4571747A | Helmet with visor mechanism | Human Necessities | 6 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.