Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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| Number | Title | Issue Date |
| 7287332 | Airplane pilot aid A pilot aid that includes a sheet material having indicia thereon indicative of a plurality of predetermined flying parameters including at least wind velocity and direction. A plurality of indicia wheels are each separately mounted from the sheet material and each ... | 10/30/2007 |
| 7073913 | Portable easel for assisting in tracing and drawing of figures A portable, lightweight easel for assisting in the tracing of figures is provided. The base has an interior volume with a projector and ancillary art supplies disposed therein. The projector has a light source and a receptacle for receiving a light-transmissible med... | 07/11/2006 |
| 5125163 | Support structures In a co-ordinate measuring machine a guideway base is formed from tubular components 10-14 of a lightweight material. An electrically heated strip 16 is located centrally of the tubular elements and fans 18 are also provided within the base. The strip 16 ... | 06/30/1992 |
| 5099581 | Portable lighted drafting table A portable, lighted drafting station comprises a shallow tray the size of a briefcase having a cover made from a sheet of translucent material sliding into slots in the rim of the tray. A T-square and two triangles are held by a set of brackets against th... | 03/31/1992 |
| 5086565 | Technical drawing apparatus Drawing apparatus for the preparation of technical drawings has a support for a drawing board on which paper may be attached. The support defines a frame surrounding the board which frame includes an upstanding lip for engagement by drawing instruments. F... | 02/11/1992 |
| 4912849 | Sketching and tracing instrument A tracing instrument for producing symmetrical sketches includes a transparent or translucent base plate, an illuminating source for projecting light through the base plate, and a transparent top plate disposed on an opposite side of the base plate from t... | 04/03/1990 |
| 4896427 | Draughting apparatus A draughting apparatus 10 comprising a plurality of substantially planar symbols elements 30 having raised outlines 50 for depicting predetermined symbols 32, a support panel means 12, 16, for supporting the symbols elements 30 in a generally planar layou... | 01/30/1990 |
| 4785546 | Lithographic production planning system A production planning system for use in providing color-separated films to a litho platemaker. The system utilizes a programmed computer for gathering and storing information relative to various images of a particular production job. A computer/digital ta... | 11/22/1988 |
| 4771543 | Patent-drafting aid A device for facilitating patent drafting comprises a base sheet, and a second sheet to which the drafting medium is affixed, the sheets having magnetic properties to maintain the base and second sheets in an alignable relationship with each other, the se... | 09/20/1988 |
| 4741107 | Artwork aid adapted for facilitating placement of lettering along arc of a circle Artwork often involves the placement of lettering along the arc of a circle. Practice is to use a compass to lay out the arc and then place the lettering along the arc. The arc is then erased. The present invention provides a lightbox whose platen is fitt... | 05/03/1988 |
| 4688333 | Self-inking stamp alignment tool An alignment structure provides means to locate a self-inking stamp in a plurality of positions over articles, which vary in size, to make repeated impressions for quantities of the same article, at a desired location. An adjustable nesting bar holds the ... | 08/25/1987 |
| 4524521 | Projection table for an optical projection pattern grinding machine In a projection table of an optical projection form grinding machine, with a transparent carrier for a form pattern drawing, which bears insertion marks, and with a transparent cover, which can be moved between an open position, in which the carrier is ac... | 06/25/1985 |
| 4514899 | Apparatus with optical projector for assembling a wooden structure Wooden structures are assembled from a plurality of wooden elements with interposed metallic connectors, by assembling the wooden elements on a work table provided with a rectangular grid. The image of the structure to be assembled, with a superposed grid... | 05/07/1985 |
| 4408850 | Drawing table The present invention provides a drawing table for use in the fields of drafting, architecture, computer graphics, and graphic arts and the like wherein the drawing table includes means allowing projection of an optical image from below onto the working s... | 10/11/1983 |
| 4295275 | Method and apparatus for making raised and flat letter signs A signmaker's jig assembly incorporates a signblank-supporting worktable, a setting bar movable over the signblank for guiding the alignment of a line of letters to be installed on the signblank, a letter staging zone incorporating a letter aligning stagi... | 10/20/1981 |
| 4250396 | Heated drafting board An electrically heated drafting board having a drawing surface temperature ranging between 80° and 90° F. The drafting board having a plurality of interconnected parallel grooves spaced apart the length thereof. The grooves are provided in the underside... | 02/10/1981 |
| 4062130 | Mechanism modeling Mechanism modeling kit in which flat simulations of machine elements may be assembled into demonstration working units, some elements being pivotable relative to others on loosely tightened grommets.... | 12/13/1977 |
