Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 6672223 | High-speed transportation mechanism on rail track A high-speed transportation mechanism on rail track, wherein sleepers 4 are laid out on gravel 5 on the ground. A first rail (mono rail) 3 for supporting the weight of a vehicle 1 is laid down on the sleepers 4. A second rail (guide rail) 7 is suspended f... | 01/06/2004 |
| 6422152 | Sliding dolly A sliding dolly that is particularly adapted to loading and unloading awkward and heavy packages, mattresses, or box springs from a truck. There is a, a dolly back frame, and a dolly shelf. There is also a means for supporting the dolly over a floor or ot... | 07/23/2002 |
| 6182576 | Monorail system A monorail system for passenger and light freight transportation provides a support structure with an essentially planar top surface and a stabilizer guide rail having a vertical web portion supporting a head portion. The head guides a vehicle along the t... | 02/06/2001 |
| 5666884 | Overhead vehicle having spring-biased, rail-urged lever-mounted guide wheel for electrically powered drive wheel A vehicle travels along a rail and, driven by an onboard motor. The vehicle includes an auxiliary guide wheel mounted in a floating arrangement on a component acted upon by a helical spring. A shaft on which the wheel is mounted is disposed in an elongate... | 09/16/1997 |
| 5092249 | Electric overhead trolley system with auxiliary rail and driven auxiliary wheel for traction The invention proposes an electric overhead trolley system in which a travelling gear (14) is provided with a motor-driven driving wheel (16) and at least one auxiliary wheel (30) interacting with an auxiliary track (28), at least in certain sections, whi... | 03/03/1992 |
| 4721043 | Track guided transportation system A track guided transportation system for shelf servicing within warehouses. A lower guide track provides a narrow channel defined between a track bottom face and a pair of track side faces, and an upper guide track extends above and parallel to the lower ... | 01/26/1988 |
| 4620486 | Rail-guard transportation system On one ground rail only, a vehicle containing upper and lower bogies is rolling. The vehicle is guided from above at a ceiling rail. Each lower bogie contains a bogie wheel which is provided with lateral flanges. The ground rail includes a head profile, t... | 11/04/1986 |
| 4394837 | Passenger station for elevated railway system In an elevated railway system having a track comprising upper and lower rails extending longitudinally along one side of a beam structure, and passenger cars traveling on the track having doors on their sides adjacent the beam structure, a passenger stati... | 07/26/1983 |
| 4338864 | Assembly line driverless vehicle A monorail driverless vehicle for use on an assembly line includes a vertically disposed frame having a drive wheel on the upper end of the frame and biased downwardly for contact with a drive shaft. Aligned support wheels on the frame are adapted for con... | 07/13/1982 |
| 4319662 | Fire fighting apparatus for a storage/retrieval machine A storage/retrieval machine (10) is provided with equipment to adapt the machine for use in fighting fires in a warehouse in which the machine is installed. A plurality of platforms (26, 30) and access ladders (28, 32) are provided along the length of the... | 03/16/1982 |
| 4313709 | Device for removing and/or re-installing manhole lids on an apparatus under pressure An integral and rapid device in which means are arranged for permitting both to support a stud tightening machine and the lids and to accurately position the tightening machine relative to each manhole and the studs. This device is particularly useful for... | 02/02/1982 |
| 4195576 | Monorail car stabilizing system A rail vehicle is disclosed for use on an elevated electric rail system having a lower rail below the vehicle and an upper rail above the vehicle. The vehicle includes a pair of lower wheels having independently rotatable flanges rollably carrying a vehic... | 04/01/1980 |
| 3981778 | Coke oven hood apparatus Apparatus for use with a coke oven having a carriageway for a quenching car along a side thereof, which apparatus comprises a hood for covering a quenching car on the carriageway, and a supporting structure which supports the hood solely from that side of... | 09/21/1976 |
| 3942450 | Overhead transportation system An overhead transportation system comprises one or more roller tracks joined in a superimposed manner to one or to both sides of a plurality of pillars or columns which form the supporting assembly of the system. Each of the roller tracks is formed of two... | 03/09/1976 |
