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 |
| 4688045 | Digital delay generator for sonar and radar beam formers This invention relates to apparatus and a method of controlling the amount of delay or phase-shift which is applied to a signal received at or transmitted from each transducer in a multi-transducer antenna to produce a beam directed at a specific target p... | 08/18/1987 |
| 4678916 | Dosimeter The invention is a radiation dosimeter and method of operation of its elements comprising a pair of silicon insulated gate field effect transistors integrated into the same substrate, each having a gate, a source and a drain. The dosimeter includes appara... | 07/07/1987 |
| 4667093 | Electronic coin measurement apparatus with size and acceleration detection This invention distinguishes coins by electronically checking their various masses, diameters and thicknesses. The coins are subjected to a constant acceleration force, i.e., gravity, and slide along a side of a ramp, which results in different velocities... | 05/19/1987 |
| 4643656 | Take-away device for plastic tubing A take-away device for a plastic tubing produced in a blowing process in which the tubing is flattened by squeeze rollers followed by a pair of take-away rollers. The pair of take-away rollers which have horizontal axes of rotation swivel reversingly abou... | 02/17/1987 |
| 4630478 | Liquid volume sensor system This invention relates to apparatus for determining the amount of liquid in a tank by measuring the pressure at the bottom and at a height above the bottom of the tank, and provides apparatus for compensating for apparent volume measurement variations cau... | 12/23/1986 |
| 4493080 | Error correcting code decoder A method and apparatus which can significantly reduce the matched filter requirements in decoding cyclic block codes, and is particularly advantageous for decoding maximal length block codes, and other cyclic block codes in which the number of codewords i... | 01/08/1985 |
| 4484076 | Direct reading dosimeter A direct reading dosimeter having a range such that it can be used by personnel workers in the medical, nuclear and industrial fields, and provides and indication of dose rate as well as total received dosage. The dosimeter uses a semiconductor sensor of ... | 11/20/1984 |
| 4479661 | Fork bar for motorcycles A fork bar for motorcycles with two clamps surrounding the fork halves of the front wheel fork, which are connected to one another by two bar parts running essentially parallel to each other. The two bar parts are rigidly connected with one clamp each. Th... | 10/30/1984 |
| 4453257 | Spectrum shaping microwave digital modulators This invention is a digital phase modulator for microwave transmitter systems. A digital signal is bandwidth limited at baseband, then is shaped to compensate for the nonlinear reflection coefficient versus bias voltage characteristics in a phase modulato... | 06/05/1984 |
| 4420284 | Device for the feeding of material bars for processing machines A device for the feeding of material bars for processing machines, with which in a tube the rearward end of the bar is moved in the direction of the processing machine by a piston guided in the tube and loaded by a pressurizing medium. A loading bellows l... | 12/13/1983 |
| 4378486 | Temperature controlled timer A temperature controlled timer useful for controlling the application of power to apparatus such as automobile block heaters or the like. In one embodiment the time of application of power prior to a shut off time is decreased with increasing ambient temp... | 03/29/1983 |
| 4375827 | Workbench table top clamping device An improved workbench table top cut away at a corner to provide a rectangular rabbet, and having an extension arm extending across the corner below the top surface of the table. A U-shaped clamping member includes an elongated arm adjoining outer and inne... | 03/08/1983 |
| 4365867 | Electrically adjustable apparatus for motor vehicle rear view mirror This invention relates to an electrically operated adjustable apparatus for a motor vehicle rear view mirror having a mirror casing, and included therein, a mirror support to which the mirror casing is connected via a first fixed junction point, and on a ... | 12/28/1982 |
| 4251536 | Rodenticides comprising 6-aminonicotinamide or 6-aminonicotinohydroxamic acid Anticoagulant compounds have been extensively used as rodenticides during the last 20 years. In most parts of the world rats have become resistant to anticoagulants. This circumstance seriously limits the usefulness of anticoagulant rodenticides, and give... | 02/17/1981 |
