Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 6582122 | Chuck and plastic packaging bag with chuck A chuck for a plastic packaging bag, comprises: a male member having a male claw portion; a female member having a female claw portion; and a mechanism for causing the male claw portion to engage and disengage from the female claw portion, wherein one of ... | 06/24/2003 |
| 6354148 | Rebound-type hardness tester A rebound-type hardness tester comprises a tubular member and an indenter hammer for undergoing axial movement therein in forward and rearward directions and for impacting a specimen and rebounding therefrom. A first detecting device detects the indenter ... | 03/12/2002 |
| 6236307 | Vehicle lock and alarm A vehicle alarm system for use with a lock (1) that is attachable to a vehicle wheel (2). The alarm system includes a lock motion detection sensor (20) and a transmitter (15) to transmit signals from the detection sensor. The motion detection sensor and t... | 05/22/2001 |
| 5827953 | Method of testing hardness in rebound type hardness tester An impacting velocity v1 and a rebounding velocity v1 ' of the hammer at a second hammer velocity measurement point 12 a distance x1 apart from a first hammer velocity measurement point 11 in the system of movement of the ... | 10/27/1998 |
| 5092990 | Filter device A filter device for cleaning water and having a reinforcing member for preventing reduction of filtering area due to deformation of filter membrane. The filter device comprises a generally cylindrical casing and a filter element contained in said casing f... | 03/03/1992 |
| 5071551 | Water purifier A water purifier comprising a primary filter for removing residual chlorine and other impurities, a secondary filter disposed downstream of the primary filter for removing microorganisms and antimicrobial means disposed between the primary filter and the ... | 12/10/1991 |
