Sierra Engineering Incorporated
7Patents
0Active
7Granted
30Portfolio score
Filing activity: Jan 21, 1976 → Jul 15, 2005
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4075714A | Helmet characterized by negative lift | Human Necessities | 103 | Expired |
| US4026245A | Personal restraint device | Performing Operations; Transporting | 40 | Expired |
| US4126131A | Facemask and goggle combination for excluding smoke or noxious gases from the goggles | Human Necessities | 27 | Expired |
| US4075715A | Helmet having anti-lift device | Human Necessities | 23 | Expired |
| US6981365B1 | Supersonic revolving nozzle | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US4059322A | Dust protective assembly for breakaway connectors | Electricity | 5 | Expired |
| US7062901B1 | Variable geometry nozzle with flexible side wall | Mechanical Engineering; Lighting; Heating | 3 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.