Did You Know...
...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8024678 | Interfacing with a dynamically configurable arithmetic unit An interface to a dynamically configurable arithmetic unit can include data alignment modules, where each data alignment module receives input variables being associated with one or more arithmetic expressions. The interface can include multiplexers coupled to the d... | 09/20/2011 |
| 7325020 | Input and evaluation of fractions using a calculator A method of input and evaluation of fractions using a calculator is described. The calculator receives a user-entered expression including a fraction where the fraction is entered using a division key. The user-entered expression causes the calculator to evaluate th... | 01/29/2008 |
| 6938027 | Hardware/software management, purchasing and optimization system The invention provides for tracking and day-to-day management of computer data centers. A knowledge base comprises technical and financial specifications of various storage devices and other computer hardware as provided. A modeling tool allows for the creation of v... | 08/30/2005 |
| 5901074 | Calculation data display devices and methods A calculation data display device includes a display which displays input calculation data in colors. When specified calculation data is input, the calculation data display device displays the calculation data input after the specified calculation data in... | 05/04/1999 |
| 5539867 | Graph display apparatus for displaying different graphs of a functional formula based on inputted coefficient data A graph display apparatus wherein a dynamic invention has the following arrangement. A dynamic graph key in a key input unit is operated by a user and a functional formula subjected to graph calculation and a change range and a change pitch of a coefficie... | 07/23/1996 |
| 5438664 | Method and apparatus for producing slips of variable length and having user-defined word names and associated word data thereon A slip producing apparatus and method for producing a slip having a variable number of word names and respectively corresponding word data, wherein a plurality of slip types and a variable arbitrary number of word names corresponding to each slip type are... | 08/01/1995 |
| 5432721 | Device and method of displaying mathematical expression for small electronic appliance When a user requested mathematical expression requiring, when normally displayed, a plurality of display rows is not an independent numerical element in another mathematical expression, for example, a numerator portion, the requested mathematical expressi... | 07/11/1995 |
| 5406280 | Data retrieval system using compression scheme especially for serial data stream A data retrieval system using a compression scheme especially for serial transmission, which does not inadvertently generate typical flow control codes, such as ASCII values less than 32. A personal computer with a modem is used to access a remote mainfra... | 04/11/1995 |
| 5241489 | Electronic computer with fraction and exponent display A portable electronic computer for conducting fraction calculations has a display including a first multiple-digit display area for displaying the numerator of a fraction, and a second multiple-digit display area for displaying the denominator of the frac... | 08/31/1993 |
| 5153845 | Time base conversion circuit A time base conversion circuit including a data interpolating circuit for converting a digital signal of sampling frequency fs into a digital signal having M (M is a positive integer) samples per N/fs (N is another positive integer) cycle without loosing ... | 10/06/1992 |
| 4800514 | Electronic graphic arts proportional calculator A specialized dimension proportioning hand-held calculator designed specifically for computing percent reductions of photographs in the graphic arts field. The calculator computes the percent reduction from an original width or height of the photograph an... | 01/24/1989 |
| 4545022 | Fractional calculator A fractional calculator (10) has a keyboard (12) with numeral keys (18) and denominator keys (20). Through use of the numeral keys (18) and the denominator keys (20), fractional inputs may be entered into the calculator and calculations carried out on the... | 10/01/1985 |
| 4504829 | Electronic equipment Electronic equipment has a memory which stores input data to be displayed. The data read out from the memory is formed as a corresponding character pattern signal and is output from a character pattern generator. The character pattern signal generated by ... | 03/12/1985 |
| 4488250 | Hand-held calculator for performing calculations in feet, inches and fractions A portable hand-held electronic calculator for performing feet, inch, and fraction calculations and for displaying numerical results in feet, inches, and fractions of inches. Values for feet, inches, and fractions of inches can be entered directly without... | 12/11/1984 |
| 4344147 | Electronic calculator with printer An electronic calculator having a printer detects the key entry by one of arithmetic keys following the numerical key entry and prints one of arithmetic symbols and entered number respectively at the left-hand side and right-hand side of the print sheet.... | 08/10/1982 |
| 4164789 | Electronic apparatus for dealing with numerical information A calculator provided with a key for entering decimal point data and a memory device for storing data therein is disclosed. Such calculator has a control device responsive to the operation of the key for entering decimal point data to cause the memory dev... | 08/14/1979 |
| 4162532 | Programmable calculator including data format display control means An adaptable programmable calculator is provided by employing modular read-write and read-only memory units capable of being expanded to provide the calculator with additional program and data storage functions oriented towards the environment of the user... | 07/24/1979 |
| 4081859 | Electronic calculator for feet-inch-fraction numerics An apparatus is disclosed for automatically adding, subtracting, multiplying and dividing feet, inches and fractions of an inch and for the recordation of the results of said arithmetic functions on a visual display. The apparatus also automatically and d... | 03/28/1978 |
| 3987290 | Calculator apparatus for displaying data in engineering notation Digital data in floating-point notation is arithmetically formatted for display in engineering notation with an exponent that is always a multiple of three and a mantissa having a decimal point. The formatting is performed under control of a routine store... | 10/19/1976 |
| 3973113 | Electronic calculator for feet-inch-fraction numerics An apparatus is disclosed for automatically adding, subtracting, multiplying and dividing feet, inches and fractions of an inch and for the recordation of the results of said arithmetic functions on a visual display. The apparatus also automatically and d... | 08/03/1976 |
| 3953719 | Latched decoder for digit outputs to an electronic digital calculator display A greatly simplified calculator circuit implemented, for example, utilizing I2 L technology, is fabricated on a relatively small semiconductor chip resulting in high yield. A unique feature of such calculator is a latched decoder for multiplexe... | 04/27/1976 |
