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...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 6039239 | Method of manufacturing structural parts, particularly for use in aircraft The present invention provides a method of making a frame, particularly for the aircraft industry, having a central member (34) and one or more cantilever ribs (32); such a frame can be made by forging or machining but these are time-consuming and expensi... | 03/21/2000 |
| 5809737 | Structural parts for use in aircraft The present invention provides a method of making a frame, particularly for the aircraft industry, having a central member (34) and one or more cantilever ribs (32); such a frame can be made by forging or machining but these are time-consuming and expensi... | 09/22/1998 |
| 5515730 | Apparatus for detecting the amplitude, frequency or modes of vibration of a vibrating panel Apparatus for detecting at least one of the amplitude, frequency and modes of vibration of a panel is described. Detection is achieved using Moire fringes by employing two diffraction gratings (33 and 38) through the first of which light is projected on t... | 05/14/1996 |
| 5486072 | Cutting tools of composite construction A cutting tool is provided which comprises a tungsten carbide body or core (2) to which is soldered, brazed or otherwise bonded at least one strip of tungsten carbide (3) that is ground to form a cutting edge or blade. A tough non-vibrating core is thus p... | 01/23/1996 |
| 5459575 | Laser fiber optic gyroscope having phase modulation In a laser gyroscope, a non-reciprocal phase modulation is introduced between the clockwise (CW) and counterclockwise (CCW) beams at a modulation frequency (f). The CW and CCW beams are combined on a detector and the intensity of the output is observed at... | 10/17/1995 |
| 5447601 | Method of manufacturing a motion sensor The method comprises the steps of providing a substrate wafer (10); depositing a first layer of resist (12) upon the substrate wafer (10); removing selected areas of the first resist layer (12), thereby to provide first etch windows; forming first cavitie... | 09/05/1995 |
