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 |
| 5367129 | Bowling ball total weight/top weight scale A scale for measuring total weight/top weight of a bowling ball includes the utilization of a pair of electronic load cells supporting a moment transfer plate with the load cells being connected to a meter. In one form of the invention, the ball is center... | 11/22/1994 |
| 4931777 | Low level alarm for drop-feed injection liquid A low level alarm device for drop-feed injection liquid comprises a mechanical arrangement where an injection liquid containing bottle is hung on one arm of a mechanical balance to be balanced by a counter weight provided on the other arm of the balance. ... | 06/05/1990 |
| 4682156 | Solvent detector An apparatus and method are provided for detecting solvents, including hydrocarbons. The apparatus includes a hydrocarbon-soluble plastic rod which interconnects a mass or weight and a weighing assembly. The weighing assembly is operatively joined to an a... | 07/21/1987 |
| 4566547 | Remaining amount indicator A remaining amount indicator for indicating remaining amount of consuming material such as papers, toner, web or silicone oil in a recording apparatus such as a copying machine or a laser beam printer is disclosed. The remaining amount detected by a detec... | 01/28/1986 |
| 4442911 | Method and apparatus for controlling zero adjustment of weight sensor A method and apparatus for controlling the zero adjustment of weight sensors adapted to measure the weight of articles. A zero adjustment control operation performed by the method and apparatus of the invention is executed by (1) discriminating whether th... | 04/17/1984 |
| 4437090 | Apparatus for indicating creosote buildup in a chimney In order to provide an indication of the extent to which creosote has built up in a chimney, an accumulator on which creosote will also build up is held suspended in a chimney in a zone where a major creosote buildup is anticipated. The accumulator is so ... | 03/13/1984 |
| 4407191 | Weight indicator for refuse compactor A weight indicator for use with a refuse compactor. Structure is provided for sensing the weight of refuse in the refuse compactor receptacle. An indicator is operatively associated with the sensing structure to provide an indication of the sensed weight ... | 10/04/1983 |
| 4034361 | Method and apparatus for storing biological matter The supply of cryogenic fluid used for controlled storage environment of biological materials is monitored so as to insure an adequate level. The monitoring is effected by employing a beam balance mechanism. Counterweights associated with the beam balance... | 07/05/1977 |
| 4023631 | Adjustable balance and indicating device An adjustable balance and indicating device for removably attaching to a beam scale of the type having a balance beam with a distended end thereof movable in an oscillating plane and having further a support adjacent the balance beam. The adjustable balan... | 05/17/1977 |
| 3974491 | Load signaling device for a patient's foot A device for signaling a patient when a predetermined load is placed on the patient's foot comprises a resilient foot pad having a toe end and a heel end and adapted to substantially cover the inner sole of a shoe. A resilient liquid filled tube is mounte... | 08/10/1976 |
| 3968848 | Digital weighing apparatus Apparatus for feeding a product to a weighing scale and stopping the feed when the amount of product fed reaches a final weight. A scale having a balance portion to receive product to be weighed is movable from an initial position toward a balance positio... | 07/13/1976 |
