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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 |
| 7724925 | System for generating thermographic images using thermographic signal reconstruction A method for compiling thermographic data including obtaining data indicative of a monotonically changing characteristic of a specimen, sequencing the data or a surrogate of the data into a plurality of groups, categorizing, within each group, the frequency distribu... | 05/25/2010 |
| 7554086 | Infrared camera measurement correction for pulsed excitation with subframe duration A method for measuring the timing of a flash event including capturing a first image prior to the commencement of a flash event. Capturing a second image during the occurrence of the flash event, and comparing the second image to the first image to determine a time ... | 06/30/2009 |
| 7186981 | Method and apparatus for thermographic imaging using flash pulse truncation A pulse controller device for controlling the excitation of a heat source used in thermographic imaging is disclosed. The pulse controller device comprises a power supply, a heat source coupled to the power supply, a device coupled to the power supply signaling the ... | 03/06/2007 |
| 7083327 | Method and apparatus for detecting kissing unbond defects A active thermographic method for detecting subsurface defects in a specimen, particularly kissing unbond defects, includes heating a specimen, applying a force to the surface of the specimen to shift and separate the walls of the defect, and obtaining thermographic... | 08/01/2006 |
| 6795784 | Data integration and registration method and apparatus for non-destructive evaluation of materials A method an apparatus for non-destructive testing and evaluation of part samples includes obtaining a defect image of the sample, displaying the defect image on a display, referencing the defect image, such as through marking or annotation, to highlight locations at... | 09/21/2004 |
| 6751342 | System for generating thermographic images using thermographic signal reconstruction A method and system for non-destructive, reference-free thermographic detection of sub-surface defects uses an infrared camera to capture multiple, spatially different images of a sample that has been heated and allow to cool to equilibrium temperature. The temperat... | 06/15/2004 |
| 6585146 | Automated non-destructive weld evaluation method and apparatus A method and apparatus for automated, non-destructive evaluation of spot welds includes a device for heating a sample containing a spot weld, an infrared camera for detecting changes in the surface temperature of the weld, and a computer to acquire and an... | 07/01/2003 |
| 6516084 | Temporal noise reduction, compression and analysis of thermographic image data sequences A method and system for non-destructive, reference-free thermographic detection of sub-surface defects uses an infrared camera to capture images of a sample that has been heated and allow to cool to equilibrium temperature. The temperature-time data obtai... | 02/04/2003 |
