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 |
| 6452049 | Recovering nitramines and reformulation of by-products Methods to recover nitramines from energetic materials yielding useable by-products and producing zero waste. The methods are used on materials containing HMX and RDX.... | 09/17/2002 |
| 6351309 | Dual modulation laser line-locking technique for wavelength modulation spectroscopy Disclosed are a method and apparatus for dual modulation of an optical spectroscopy laser. Demodulation is accomplished in a manner resulting in measurement of absorbance of a gas species, as well as stabilization of laser wavelength and baseline noise re... | 02/26/2002 |
| 6322368 | Training and testing human judgment of advertising materials An apparatus and method for training and testing human judgement concerning one or more complex human activities. Computer storage and access of a plurality of audio/visual presentations and corresponding measures of performance is provided, the presentat... | 11/27/2001 |
| 6230570 | Turbulent spot flowmeter A flowmeter and flow measurement method employing the determination of convection speed of turbulent spots. A plurality of sensors is employed, preferably thin-film gauges operating in constant temperature, constant current, or constant voltage mode. Airs... | 05/15/2001 |
| 6088987 | Modular building materials Building materials of modules of at least one mortise and tenon and either a curvilinear side face or joinder of the modules at angles other than zero and ninety degrees. Lateral ends of the modules are flush with lateral ends of adjacent modules. Prefera... | 07/18/2000 |
| 5999210 | Military range scoring system A military range scoring system with a plurality of imagers capable of viewing reference points and impact points for ordinance aimed at the reference points, imager position controllers, and data processors and video monitors for processing and viewing d... | 12/07/1999 |
| 5973896 | Shock and arc protection device for an electrical distribution system An apparatus and method for electrical shock protection and electrical arc fault protection in an electrical distribution system. The invention consists of a current interrupting circuit that impedes electrical current flow during short time intervals in ... | 10/26/1999 |
| 5844759 | Electrical fault interrupter An apparatus and method for the avoidance of electrical shock in an electrical appliance. Preferred for a two wire appliance, the device consists of a current interrupting circuit that impedes current flow for short time intervals in each half cycle. If a... | 12/01/1998 |
| 5776605 | Replacement surface and method of installation A replacement surface covering an existing surface conforming surface irregularities of the existing surface to present a top surface with a relatively smooth contour, and a self-curing, waterproof adhesive layer which envelops and seals any cracks on the... | 07/07/1998 |
| 5738497 | Apparatus and method for controlling a rotary screw compressor A process and apparatus for controlling a rotary screw compressor capacity mechanism by manual pneumatic means. The apparatus compromises a specially placed rotary type cartridge valve enclosed in a valve body and housing. The assembly is attached via a f... | 04/14/1998 |
| 5375195 | Method and apparatus for generating composites of human faces A method and apparatus for generating a composite of an individual face by an person not skilled in computer use, without need for recalling particular facial characteristics. The invention requires rating of a small number of faces, which are then conver... | 12/20/1994 |
| 5355435 | Asynchronous temporal neural processing element An asynchronous temporal neural processing element. The processing element is useful in solving problems from the class of temporal signal processing problems and is modeled closely on the sub-cellular biology and electrophysiology of neurons having chemi... | 10/11/1994 |
| 5293619 | Method and apparatus for collaborative use of application program Method and apparatus permitting the collaborative use of a computer application program simultaneously by multiple users at different stations. The method is useful with communication protocols having client/server control structures. The method of the in... | 03/08/1994 |
