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 |
| 7379643 | Optical fiber sensor based on retro-reflective fiber Bragg gratings A retro-reflective sensor for sensing mechanical, chemical or temperature related information, is disclosed. The sensor is formed of an optical waveguide suitable for use in-situ in a high temperature environment having a Bragg grating written into a core region the... | 05/27/2008 |
| 7307666 | Transmitter identification system The invention relates to a transmitter identification system, which utilizes an identification signal embedded into a digital television signal, enabling the transmitter of origin to be identified at a receiving station. Ideally the identification signal is an ortho... | 12/11/2007 |
| 7245795 | Optical device incorporating a tilted bragg grating The invention relates to an optical waveguide device for monitoring a characteristics of light, e.g. a wavelength. The device incorporates a waveguide, such as an optical fiber, with an embedded tilted Bragg grating operating in a regime of wavelength detuning. The ... | 07/17/2007 |
| 6944803 | CODE STRUCTURE, ENCODER, ENCODING METHOD, AND ASSOCIATED DECODER AND DECODING METHOD AND ITERATIVELY DECODABLE CODE STRUCTURE, ENCODER, ENCODING METHOD, AND ASSOCIATED ITERATIVE DECODER AND ITERATIVE DECODING METHOD A class of codes and associated methods and devices are provided. Advantageously, such codes when used as constituent codes in composite codes intended for iterative decoding, as compared to the standard practice of using convolutional codes, may allow better error-... | 09/13/2005 |
