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 |
| 7181636 | Method of ensuring synchronous presentation of additional data with audio data recorded on a rewritable recording medium A recording medium and a method and apparatus for managing data are provided. The method includes recording additional data in a data file separate from a file containing main data and recording navigation information that links the main data and the additional data... | 02/20/2007 |
| 6778252 | Film language A method for modifying an audio visual recording originally produced with an original audio track of an original speaker, using a second audio dub track of a second speaker, comprising analyzing the original audio track to convert it into a continuous time coded fac... | 08/17/2004 |
| 4483599 | Simultaneous visual and audio signal apparatus Apparatus is provided for producing simultaneous visual and audio signals for synchronizing separate simultaneously produced visual and sound recordings, e.g., for use when making cinematographic or video recordings and separate sound track recording. The... | 11/20/1984 |
| 4453234 | Nonvolatile semiconductor memory device A nonvolatile semiconductor memory device having floating gate type field effect transistors with floating gate electrodes. In the memory device, a source region, an active region and a drain region are formed in a first semiconductor region. A second sem... | 06/05/1984 |
| 4220403 | Synchronizing means for motor-drive systems Two or more motor driven systems are maintained in synchronism by a recorded wave of sine form on a tape driven by one of said systems, a signal derived from said sine wave being used to drive a stepper motor or stepper motors included in the other system... | 09/02/1980 |
| 4050793 | Portable slating device A portable slating device comprises a light-tight housing having a lens on the front thereof and a copyholder on the rear thereof. When the lens on the front end of the housing is positioned adjacent the lens of a movie camera whose scene takes are to be ... | 09/27/1977 |
| 3940208 | Control frequency generator for a movie camera In a movie camera a control frequency generator for producing a picture and sound synchronizing sinusoidal control frequency using a rotating member of the camera such as a running gear made from a soft magnetic material and having a magnetically disconti... | 02/24/1976 |
