Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7659484 | Retrofit electronic weighing technology for pallet moving devices A weighing system for use in retrofitting a pallet handling apparatus to provide weighing functionality. The system comprises a control unit and two fork units. The electronic control unit has a display, an electronic weight calculation controller, and at least one ... | 02/09/2010 |
| 7232962 | Mobile hospital bed scale A mobile hospital patient bed scale is contemplated which lifts the entire bed with patient in situ on a load platform with an aperture to accommodate the undercarriage of many hospital beds such as a motor. The scale minimizes both vertical and horizontal displacem... | 06/19/2007 |
| 7002083 | Hand truck weighing device and weighing method The invention includes a device for and a method of weighing. A device according to the invention is a hand truck having weight sensors in each toe-portion. A method according to the invention uses such a hand truck to provide a weight signal corresponding to the we... | 02/21/2006 |
| 6978671 | Gas tank gauge A device for measuring and indicating the volume of the contents of a tank includes a fixed base. A spring deflectable with to the base is also provided. The spring supports at least a portion of the tank weight. A visible connector is connected to the spring such t... | 12/27/2005 |
| 6855894 | Mobile lifting device and weighing device therefor A mobile lifting device comprises a mobile frame (1, 12, 13) with a set of lift forks (3) for receiving a pallet thereon. The pallet truck is provided with a weighing device which comprises at least one pressure or strain-sensitive sensor (20) i... | 02/15/2005 |
| 6717072 | Bed balance The invention relates to a bed scale with a plurality of measuring feet which each support one leg of the bed and are provided with a force transducer which delivers a signal representing a weight force acting on the measuring foot and furthermore with an evaluation... | 04/06/2004 |
| 6222137 | Dolly type drum scale A portable scale for weighing drums, cylinders and other containers is describe. The scale is lightweight and easily transportable and due to the use of three load cells instead of the traditional four, it is highly accurate even on uneven floor surfaces.... | 04/24/2001 |
| 6148668 | Gas grill tank scale An apparatus for indicating the amount of fuel in a fuel tank for a barbecue grill is disclosed. The apparatus includes a first housing member having indicator marks on an indicator wall thereof, a second housing member slidably engaging the first housing... | 11/21/2000 |
| 6124554 | Portable pallet scale A portable platform-scale weighing system comprises a floor dolly and lift mechanism that allow a heavy low-profile platform scale to be used practically anywhere truck cargoes need to be weighed. The low-profile platform scale includes a shear-beam load ... | 09/26/2000 |
| 6119475 | Tank unload apparatus A lift assembly which is coupled to a refrigerant service cart to raise and lock the supply tank of refrigerant off of a weight sensor, locking the tank in a raised position for transportation of the portable servicing cart. In a preferred embodiment, a f... | 09/19/2000 |
| 5739478 | Weighing scale A scale for weighing a load, which is made up of a base (12), a weighing platform (34) for supporting the load and a load cell (36, 98) located below the weighing platform so as to alternate between an operational position, in which the weighing platform ... | 04/14/1998 |
| 4033420 | Weighing scale This scale is primarily intended for the weighing of a hospital bed containing a patient. It may weigh an empty bed or any wheeled load. The scale is mounted on a frame which rests on the floor during a weighing operation, and is lifted off the floor onto... | 07/05/1977 |
