"Everyone acquainted with the subject will recognize it as a conspicuous failure."
Henry Morton, president of the Stevens Institute of Technology ; Said in 1880 about the light bulb
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| Number | Title | Issue Date |
| 7712461 | Air propelling toy An air propelling toy for directing a quantity of air in a desired direction includes a housing including a perimeter wall that defines an interior space of the housing. The housing has an outlet port that extends through the perimeter wall and is in fluid communica... | 05/11/2010 |
| 7191774 | Accurate toy air gun targets A toy air gun and in particular an improved air gun for generating vortex rings are described. The gun is designed so that the path along the axis of air motion from the rear of the gun to the air exit hole is optically transparent, and contains patterns normal to t... | 03/20/2007 |
| 6578566 | High efficiency paintball marker bolt and bolt head An improved paintball marker bolt and bolt head uses a curved gas inlet ramp and geometrically designed outlet holes to provide pressurized gas flow with decreased turbulence and more uniform distribution over the paintball surface. The improvements in ga... | 06/17/2003 |
| 5535829 | Repeating injector for fire extinguishing gas In order to carry out a fire extinguishing operation by ejecting a fire extinguishing gas having cooling and oxygen deficiency functions and a high fire extinguishing capacity from a plurality of cylinders in succession, a repeating injector is provided w... | 07/16/1996 |
| 4708341 | Archery/practice exercise device and attachments therefor An archery practice/exercise device for use with a bow including a handleriser portion and a bow string. The practice/exercise device includes a cylinder having a closure member for partially closing a forward end of the cylinder so as to delimit an orifi... | 11/24/1987 |
| 4653433 | Flea zapper This invention is a hand operated powder dispenser, and includes a case having a powder chamber, and a trigger activated mechanism that slides a ram rod through the chamber to move the powder out a dispensing opening.... | 03/31/1987 |
| 4623145 | Archery/practice exercise device and attachments therefor An archery practice/exercise device for use with a bow including a handleriser portion and a bow string. The practice/exercise device includes a cylinder having a closure member for partially closing a forward end of the cylinder so as to delimit an orifi... | 11/18/1986 |
| 4157703 | Toy gun An improved toy air gun is disclosed comprising a generally parabolic barrel having a muzzle opening at the truncated apex of the parabola. A handle and trigger mechanism are attached to the barrel exterior opposite the muzzle. A resilient diaphragm is mo... | 06/12/1979 |