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...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 7148066 | Dye solutions for use in methods to detect the prior evaporation of anhydrous ammonia and the production of illict drugs Systems and methods providing for the introduction of a dye, particularly a xanthene dye, and more particularly a rhodamine dye, to liquid anhydrous ammonia to discourage theft of the anhydrous ammonia and provide for leak detection in storage vessels. The dye will ... | 12/12/2006 |
| 6899827 | Inorganic optical taggant and method of making Sintered, translucent ceramic microbeads, preferably alumina, titania, zirconia, yttria, zirconium phosphate, or yttrium aluminum garnet (YAG) are doped with one or more optically active species. The beads may be added to substances such as explosives in order to cr... | 05/31/2005 |
| 6455157 | Method for protecting and marking products by using microparticles The invention relates to a method for protecting and marking products by using microparticles, which are to be attached or added to the product, each microparticle having several color layers forming a code, wherein for each individual product two or more... | 09/24/2002 |
| 6007744 | Polymerizable dyes as taggants Liquids, such as petroleum fuels, are tagged with chemical compounds having a light-absorbing identifying chemical moiety and at least one polymerizable chemical moiety. The marker is identified in a specimen of the liquid by polymerizing the marker compo... | 12/28/1999 |
| 5356465 | Oil-spill marking method and composition A method for visibly marking an area contaminated with transformer oil or other organic liquid uses a marking composition that consists of a colorant held within a solid carrier material, the colorant being such as to effect a visibly perceptible change u... | 10/18/1994 |
| 5182051 | Raioactive tracing with particles There is provided radioactive particles having a ceramic matrix and an element which can be bombarded with neutrons to produce a gamma ray-emitting isotope. The particles are manufactured by mixing the ceramic components and the element, forming particles... | 01/26/1993 |
| 4744919 | Method of dispersing particulate aerosol tracer A particulate aerosol tracer which comprises a particulate carrier of sheet silicate composition having a particle size up to one micron, and a cationic dopant chemically absorbed in solid solution in the carrier. The carrier is preferably selected from t... | 05/17/1988 |
| 4683070 | Determination of metal source in used oil A tracer metal, which is not present in engine parts subject to wear, is used to ascertain the source of metals in used oil as between lubricating oil additives and other sources, particularly wear of engine parts.... | 07/28/1987 |
| 4654165 | Microingredient containing tracer A tracer particle for determining the concentration of a microingredient in a bulk material is disclosed. The tracer particle comprises a finely divided ferromagnetic particulate material approximately 90% of which is approximately 325 mesh or smaller, a ... | 03/31/1987 |
| 4640035 | Identifying means A particulate coding material, e.g. for identifying the origin of a product by introducing it at source without its presence being readily apparent, comprises particles formed as thin transverse sections of an assembly of elongated elements, e.g. of plast... | 02/03/1987 |
| 4469623 | Detection of articles Vapor permeable microcapsules filled with volatile perfluoroalkyl bromide and used to tag articles for the detection thereof.... | 09/04/1984 |
| 4441943 | Polypeptides as chemical tagging materials The present invention provides a method of tagging a substance to allow subsequent identification thereof comprising incorporating in the substance a polypeptide. Typically, the polypeptide is a synthetic polypeptide having a specific sequence of amino ac... | 04/10/1984 |
| 4399226 | Tagging with microcapsules containing perfluoroalkyl pentafluorosulfide Vapor permeable microcapsules filled with volatile perfluoroalkyl pentafluorosulfide and used to tag articles for the detection thereof.... | 08/16/1983 |
| 4390452 | Microparticles with visual identifying means Microparticles encoded for retrospective identification of substances into which they are incorporated. The novel microparticles have flat surfaces bearing repetitive identifying indicia such as alphanumerics which can be visually interpreted under magnif... | 06/28/1983 |
| 4197104 | Magnetic tag process Ferrite particles having a plurality of distinct Curie temperatures are encapsulated within a glass matrix to provide tagging material especially useful in identifying explosive materials even after detonation. In one embodiment, phosphor is dispersed wit... | 04/08/1980 |
| 4152271 | Tracer-containing composition A dry homogeneous admixture including a bulk material, a micro-ingredient, and a solid particulate tracer in a preselected ratio to the micro-ingredient, comprising a vehicle of ground iron or other ferromagnetic material that will become magnetized by a ... | 05/01/1979 |
| 4131064 | Tagging particles which are easily detected by luminescent response, or magnetic pickup, or both Small particles for tagging of objects to be identified comprise luminescent material plus other material which provides information indicia for tagging purposes. Included in the tagging particles are very small particles of magnetic material which is ref... | 12/26/1978 |
| 4053433 | Method of tagging with color-coded microparticles An improvement in the known method of tagging individual units of production of a substance with microparticles for retrospective identification is disclosed. The improvement comprises the use of microparticles which are encoded with an orderly sequence o... | 10/11/1977 |
| 4018635 | Phosphor combination, particularly adapted for use with explosives, for providing a distinctive information label Phosphor-explosive material combination and method wherein a small amount of inorganic phosphor is mixed with explosive material to provide an indicia or label of information regarding the explosive, either before or after detonation of same. The phosphor... | 04/19/1977 |
| 4009008 | Colored water immiscible organic liquid Novel disazo colorants or dyes for marking organic liquids, the colorants having the general formula ##STR1## where R1 is H, CF3, or alkyl having from 1 to 4 carbon atoms, R2 is H, or alkyl having from 1 to 4 carbon atoms,... | 02/22/1977 |
| 3964294 | Technique and system for coding and identifying materials Microencapsulated spheroids containing a coded, volatile electron absorbing substance are dispersed into a material to be regulated such as crude oil in a tanker. Samples of the material such as an oil spill are collected and the source of the material is... | 06/22/1976 |
