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| Number | Title | Issue Date |
| 4216373 | Method and apparatus for copy-fitting Method and apparatus for copy-fitting, using a new parameter called Font ID in a circular calculator having a plurality of relatively rotatable disks, some of which have cursors affixed thereto, and one or more freely rotatable cursors. Scales on the seve... | 08/05/1980 |
| 4194111 | Tidal depth calculator There is disclosed a marine navigational calculator device of the slide rule type whereby tidal depths over bottom structures may be determined as a function of the time of the tide or time of calendar day and whereby the entire time span available to a m... | 03/18/1980 |
| 4181090 | Dial-a-Metric "DIAL-A-METRIC" is a measuring device with top and bottom rotating dials and a stationary center dial inscribed with six calibrated scales on two sides. The top and bottom dials have three die cut hairline windows on each side. When the two dials are rota... | 01/01/1980 |
| 4174674 | Device for citizens band radio users to determine highway location A portable device to determine highway marker locations including an enlarged disc dial having graduated scale markings on each side thereof and therearound representing increasing and decreasing highway mileage markers, respectively, and smaller disc dia... | 11/20/1979 |
| 4149068 | Circular sliderule improvement An improved circular sliderule for use in many applications wherein it is desired to provide a sliderule having superimposed disc elements which may be freely rotated without disturbing the previous setting of the adjacent discs. The novel improved calcul... | 04/10/1979 |
| 4124796 | Emission control calculator An adjustable display having interworking parts whereby upon manipulation interference frequencies emitted from spurious harmonic and imaged electromagnetic radiators interfering with an intended or expected bracketed received frequency can be isolated an... | 11/07/1978 |
| 4117315 | Radioactive dose calculating device Calculating device provided with scales for calculating radioactive doses and intensities, in which the scales are arranged for calculating the product of the intensity in a radioactive area at a given instant and a dose factor to be determined by experim... | 09/26/1978 |
| 4108357 | Feed-rate indicator for electrochemical grinding An electrochemical grinding process is controlled by the use of a feed-rate indicating device which calculates and displaces the feed-rate (V) of a workpiece and a grinding wheel which are displaced relatively toward one another. The feed rate V is determ... | 08/22/1978 |
| 4097997 | X-ray calipers An X-ray caliper is disclosed having upper, intermediate, and lower discs movable relative to each other, the upper and lower discs have arms extending therefrom between which the part of the anatomy to be x-rayed is positioned, the upper disc has a chart... | 07/04/1978 |
| 4048477 | Weight control calculator A hand-held weight control calculator which allows an individual to quickly and accurately determine the daily maximum food calories allowed for either maintaining body weight or for losing a particular number of pounds as a function of individual weight ... | 09/13/1977 |
| 4032754 | Global time system A global time system having a first disc divided into twenty-four equal sections, each section being formed by lines extending radially from the center of the first disc. Each line forming the sections representing a line of longitude. Circles are concent... | 06/28/1977 |
| 4026463 | Circular slide rule suitable for use in determining the electrolyte deficiency in infusion therapy A circular slide rule is provided suitable for use in a method determining the electrolyte deficiency in the extra-cellular space from the measured electrolyte deficiency per volume of serum, body weight and body height, and is a method of determining ele... | 05/31/1977 |
| 4002097 | Chord progression selector A chord inversion coordination aid comprises a plurality of dials of increasing diameter and each representing a particular chord type and having a peripheral array of the scale tone names of the chord in its root and inverted positions arranged in sector... | 01/11/1977 |
| 3986002 | Hand-holdable laser system computer A laser system computer in the preferred form of a hand-holdable, two-sided circular slide rule, for quickly and accurately solving a wide range of problems which are associated with laser radar, designation, communications and directed energy application... | 10/12/1976 |
| 3969973 | Devices for selective display of information A musical information display device includes first and second relatively rotatable members, the first member bearing spaced musical indicia and the second member including apertures registrable with the first member indicia on such rotation and aperture-... | 07/20/1976 |
| 3937930 | Rotary slide rule for topographic calculations A rotary calculator is disclosed for use in site grading applications and other surveying operations involving the conversion of rod readings to datum or sea level elevations, the determination of depths of cut or fill required for finish grading, and the... | 02/10/1976 |
