Did You Know...
...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 7175154 | Piston structure and liquid feeder valve Piston structure having a first side and a second side and in a recess (6) formed in an outer portion of the piston (1, 22) a resilient sealing element (5, 11, 21) is placed. The axial width and at least in some places the radial depth of the re... | 02/13/2007 |
| 6230937 | Dispensing outlet assembly A dispensing outlet assembly for a connection to a beverage container such as a bottle, comprises a body having an inlet for connection to the container, and a dispensing outlet through which beverage is dispensed from the container. A flow passage betwee... | 05/15/2001 |
| 4577829 | Self closing valve A self closing valve has a housing with a water inlet and outlet and with a valve piston positioned inside it in such a way that the end of the piston facing away from the valve seat demarcates a discharge chamber in conjunction with the inlet and outlet ... | 03/25/1986 |
| 4171572 | Light control apparatus for a dental handpiece An apparatus for controlling the actuation of a light for illuminating the work zone adjacent the operative end of a dental handpiece. The apparatus includes (a) switch for actuating a light source when a signal is transmitted to the actuating switch from... | 10/23/1979 |
| 4096215 | Device for applying gas to a liquid The device for introducing a gas into a liquid by supplying gas to a gas introducing means located on the bottom of a tank in which the liquid is being held, and collecting the gas above the liquid after it passes through the liquid. A closure for the tan... | 06/20/1978 |
