"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 7739783 | Head protection system and method According to some embodiments of the invention, a system for securing a helmet to the head of a user is provided. The system includes a helmet body, and a roll cage disposed substantially within the helmet body. The system also includes at least a portion of a helme... | 06/22/2010 |
| 7246383 | Fit adjustment mechanism for helmets A fit adjustment mechanism for the headband of a helmet including a bridge and a buckle. The bridge has ratchet teeth extending from the exterior surface. Each of the ratchet teeth has a tapered surface, a top land, and a retention surface with an undercut face bene... | 07/24/2007 |
| 7178955 | Safety headlight A safety headlight with a battery power monitor is provided. The headlight includes one primary light bulb and at least one LED bulb. When the battery power begins to fade so that the primary bulb is in danger of going out, a sensor in the headlight switches power t... | 02/20/2007 |
| D508150 | Bicycle helmet | 08/02/2005 |
| 6904618 | Sports helmet with adjustable ventilation A helmet for protecting the head of a wearer during sporting activities, comprising a protective shell, vents formed in the protective shell, and a shutter plate positioned within the protective shell. The shutter plate has apertures conforming in dimension and posi... | 06/14/2005 |