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| Number | Title | Issue Date |
| 6705646 | Compact multiyear calendar A multiyear calendar in the form of a multipage, book-like assembly with a standard page and 14 leaves on top thereof, each leaf rotatable along an edge seam to expose another leaf below. The standard page has a two dimensional array which graphically presents the b... | 03/16/2004 |
| 6279958 | Food portion tabulator and method of use A food portion tabulator device that is an aid for calculating and evaluating an individuals daily intake of food portions. The device is self-contained, having various indicia pertinent to various food groups thereon, includes movable pins which correspo... | 08/28/2001 |
| 5825001 | Function calculator with graphic chart facility In tracing a functional equation, a maximum value of the functional equation and an intersection with another functional equation can be recognized on a graph of the functional equation. Coordinate values of any traced dot may include an intersection poin... | 10/20/1998 |
| 4994656 | Logic design slide rule A logic design slide rule comprises, in a preferred embodiment, front and rear cover plates coupled together; interior slide channels formed between the covers; and a plurality of slides disposed between the covers and able to move horizontally from left ... | 02/19/1991 |
| 4797539 | Alcoholic concentration indicator An alcoholic concentration indicator comprising three superposed circular discs adapted to rotate about a common axis. The lower disc displays on its margin a scale of alcohol concentration indicia and over its central surface a multiplicity of numbers re... | 01/10/1989 |
| 4785164 | Slide calculator for background lighting There is disclosed herein a slide calculator for determination of flash-to-background distance for studio photography when using color filters over the flash. By use of the calculator, known factors, such as lens f-stop, film speed, flash guide number (GN... | 11/15/1988 |
| 4750398 | Chord speller A chord speller is provided and consists of a housing with a vertical slide member and a horizontal slide member intersecting and overlapping the vertical slide member. The horizontal slide member has a plurality of musical notes thereon while the vertica... | 06/14/1988 |
| 4585927 | Apparatus for predicting the exact time of currents in terms of the year, month, day and hour Apparatus for presenting tidetable data in a form visually readable to the average person in terms of the year, month, day and hour of occurrence, exacting information regarding current flow, i.e. the direction of current flow, the relative strength of cu... | 04/29/1986 |
| 4456821 | Time/speed/distance slide rule A slide rule for solving time/speed/distance problems where distances are measured with a single or universal ruler applicable to all charts or maps regardless of scale. Result is achieved by printing alongside time entries on the slide rule a row of appr... | 06/26/1984 |
| 4418274 | Slide rule - calendar A slide rule-calendar having a fixed part, two sliding parts and a cursor. On the lower portion of the fixed part, the thirty-one days of the longest month are indicated horizontally. The twelve months of the year are indicated on the left vertical portio... | 11/29/1983 |
| 4401943 | Electrical efficiency meter A device for determining the operational costs of electrical devices. A case encloses a measuring instrument including a circuit which is connectable to a power source and to the device being checked. The instrument has a dial calibrated to give readings ... | 08/30/1983 |
| 4324975 | Tax calculator A hand-held calculating device for calculating Federal Income Taxes or the like includes substantially flat, elongate front and rear cover members and an insert card. Suitable structure is provided for joining the cover members with the card slidably inse... | 04/13/1982 |
| 4322608 | Metric-english measurement comparator device A device for converting between the metric and English systems of measurement including a circular scale disc having concentric scales on one side graduated according to the English system and correlated concentric scales on the opposite sides graduated a... | 03/30/1982 |
| 4241867 | Slide rule A novel product selection slide rule is disclosed which allows the user of the slide rule to quickly determine which product from a grouping of products is best for a particular condition or property which he selects. The applicant's slide rule isolates t... | 12/30/1980 |
| 4203542 | Calculating apparatus A calculator is described which greatly simplifies the calculation of the required feeder head parameters, e.g. size, amount of antipiping compound, in casting metals. Only the size of the casting section being fed and the normalized inscribed circle rela... | 05/20/1980 |
| 4189634 | Slide rule for hyperalimentation dosage computations The present invention provides a slide rule for use by physicians, pharmacists and other medical or hospital personnel in determining and computing dosages to be administered by hyperalimentation. Total calories in the dosage, as well as final percent con... | 02/19/1980 |
| 4186297 | Sunlight calculator A calculator for sunlight effect having a base portion which holds two orthogonal plate slides of which one is transparent and provided with a double curve system enabling plotting of any day/hour combination, the curve system, being characteristic for a ... | 01/29/1980 |
| 4179610 | Apparatus to indicate bio-rhythm curves Apparatus for simultaneously indicating the bio-rhythm curves which illustrate the emotional, mental, and physical cycles of a person comprising three slide elements, two of which are overlayed on the third and are transparent to simultaneously display al... | 12/18/1979 |
| 4140895 | Biorhythm scale A biorhythm scale adapted to secure its operation and capable of directly observing the periodic day and the half-periodic day a physical, sensitive and intellectual rhythm for the individual or individuals in an accurate manner. The biorhythm calculator ... | 02/20/1979 |
| 4124795 | Fire protection calculator A calculator and method for simply and quickly selecting appropriate spot type fire detectors and determining their preferred locations in a chosen space division in accordance with standard spacing ratings. The slide rule-like calculator includes a body ... | 11/07/1978 |
| 4121759 | Pavement system calculator A calculator for determining optimum pavement design comprising a pair of slidable members and a plurality of scales associated therewith for determining the Design Traffic Number, Structural Number, depth requirements and costs.... | 10/24/1978 |
| 4117313 | Calculator for laying out parking lots A calculator for facilitating the layout of parking lot stalls of desired length and width at a desired angle. The calculator includes a first member having orthogonal length and width scales as well as angle indicators relating to desired stall angle. A ... | 09/26/1978 |
