The first match was accidentally discovered in 1826 when John Walker scraped a stick with chemicals on the end against a stone floor.
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| Number | Title | Issue Date |
| 6518569 | Ion mirror Novel ion mirrors comprising, in a preferred embodiment, three cylinders, rectangles or truncated cones to improve the resolving power in the time-of-flight mass spectrometers over broad ion kinetic energy ranges. The achieved electric field is non-linear... | 02/11/2003 |
| 6224969 | Optical phantom suitable for stimulating the optical properties of biological material and a method of producing said phantom The invention relates to an optical phantom that is suitable for simulating the optical properties of biological material and to a method of producing said phantom. The phantom is comprised of a matrix of poly(vinyl alcohol) (PVA) and spherical particles ... | 05/01/2001 |
| 6224932 | Cryogenic rheological modification of tree nuts A method and apparatus for cryogenic rheological modification of tree nuts and other shelled foodstuffs wherein brief cryogenic exposure facilitates further processing, particular shell removal. Nuts from a bin (12) of conditioned nuts are transported by ... | 05/01/2001 |
| 6219142 | Method and apparatus for determining wave characteristics from wave phenomena An apparatus and method for determining wave characteristics from wave phenomena. The apparatus and method employ eigenvectors to yield a variety of wave characteristics from wave phenomena data.... | 04/17/2001 |
| 5969825 | Dual-modulation laser line-locking for wavelength modulation spectroscopy An improvement to a dual-modulation line-locking device for wavelength modulation spectroscopy employing a lowpass filter to generate a nonnormalized error signal and a bandpass filter and RMS-to-DC converter to generate a centering signal. When the error... | 10/19/1999 |