...that on Dec. 15, 1836, the Patent Office was completely destroyed by fire? Lost were some 7,000 models, 9,000 drawings, and 230 books plus all records of patent applications and grants.
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| Number | Title | Issue Date |
| 6373509 | Method and apparatus for indicating information on a chart recorder A chart recorder apparatus wherein information is indicated by using light emitting devices which are disposed to access the rear surface of a chart on which measured signals of a chart recorder are recorded on a front surface thereof. Various types of in... | 04/16/2002 |
| 5978000 | Combined chart recorder and device controller An improved chart recorder integrates a variety of flexible control functions, including the ability to program a plurality of set points, which are advantageously made visually apparent on the chart recorder paper and used for direct equipment control. I... | 11/02/1999 |
| 5311266 | Image forming apparatus having particle modulator An image forming apparatus is low priced and has a compact size. The apparatus is further capable of easily controlling toner particles such that the toner particles pass through individual apertures without a high-priced high-voltage A.C. power supply an... | 05/10/1994 |
| 4152709 | Recorder for electric appliances A disc-like sheet of pressure-sensitive material rests on a turntable rotatably mounted on a housing. The sheet has spaced scale markings there on around its circumference indicating units of time. A stylus arm is movably mounted on the housing in proximi... | 05/01/1979 |
| 3973265 | Temperature recording instrument The temperature Recording instrument contains the usual thermal measuring system consisting of a bellows assembly, a temperature sensitive bulb and capillary tubing between the bellows and bulb and a recording system including a marking element which is r... | 08/03/1976 |