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 |
| 5450764 | Displacement sensor A sensor (1) for sensing the displacement of a body (12) comprises a deformable strip (2) enclosed in a chamber 3. The strip is constrained under longitudinal and transverse constraint such that end portions (9, 10) of the strip are parallel to a directio... | 09/19/1995 |
| 5400140 | Method of decoding a spectrally modulated light signal In a method of analyzing a spectrally modulated light signal received from an interferometric transducer the value of an optical path difference associated with a parameter to be remotely sensed is encoded as a characteristic frequency of spectral modulat... | 03/21/1995 |
