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 |
| 6895988 | Self-actuating control valve for a bed pad or seat pad A fluid operated control valve for controlling fluid flow of a system which includes a first and a second fluid channels therein, the control valve includes: a hollow casing with closed first and second ends; a piston member slidably disposed within the casing and d... | 05/24/2005 |
| 4344212 | Valve and a wire cutting, skinning and wrapping tool employing the valve The valve includes an input port and two output ports and an arrangement to cause fluid pulses to appear at the output ports as a result of the appearance of fluid pulses alternately at the inlet port. The fluid pulses fed to the inlet port directly appea... | 08/17/1982 |
| 4244391 | Pneumatic program register and corresponding module A pneumatic program register comprising a plurality of sequential by cascaded modules, each module comprising a pneumatic flip-flop, an AND cell with two inputs and an OR cell with two inputs, one input of said OR cell being connected with the output of s... | 01/13/1981 |
| 4205700 | Control circuit for pneumatic phase The invention provides the functional reliability of an automatic device, constituted by the association of phase cells comprising, for each phase, a pneumatic AND gate and bistable memory, which is ensured by the interposition of a threshold relay betwee... | 06/03/1980 |
| 4181141 | Pneumatic circuit arrangement A pneumatic control for cyclic successive activation of a plurality of pressure fluid consumers and comprising a series of control modules abutting each other in side by side relation for controlling activation of respective ones of the consumers. Each co... | 01/01/1980 |
| 4112962 | Integrated pneumatic logic module A pneumatic logic control module is disclosed which includes three miniaturized, piloted, detented relay valves mounted on a pneumatic circuit board including a valve mounting plate, a circuit plate having routed flow paths formed in each face, and a conn... | 09/12/1978 |
