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Document Title |
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5717193 |
Method and apparatus for determining the exponential powers of "i"
The present invention provides methods and apparatus for readily determining the value of the imaginary number "i" raised to different exponential powers. Calculations pertaining to the imaginary...
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5664334 |
Inclination angle ruler
This invention pertains to a new type of ruler for measuring the angle of inclination of a portion of terrain from a topographical map. Topographical maps contain precise information relating to...
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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...
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4436990 |
Counting device
A cup counting device for use in open ended tubular dispensing devices, the device having a plurality of reverse scales extending towards the center of the device from the ends thereof, each scale...
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4419572 |
Check digit calculator
There is provided a calculator for calculating check digits which are obtained from code numbers according to a modulus 10, modulus 11 or the like check. In accordance with one embodiment of the...
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4410797 |
Calculation table for family planning
A calculation device for family planning, particulary for pre-planning the sex of a child. The device has a guide plate having a number of parallel guides arranged one above the other, and a cover...
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4352978 |
Analog balance
A calculating device comprising a rockable cradle having a number of parallel grooves formed in its upper surface, each of which supports a beam provided on at least one of its faces with a...
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4327500 |
Computational aid device for Ekelund ranging
A computational aid device for Ekelund range determinations comprising a e member adapted to be placed over a bearing/time plot and including two leg members to be aligned with intersecting bearing...
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4108356 |
Scheduling tool
A scheduling tool for establishing estimated duration of a contractual obligation involving multiple phases and associated functions thereof is utilized with a normalized scale and various overlays...
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4056359 |
Profile recognition apparatus for identifying bacteria
A suspension of an unknown micro-organism is introduced into a plurality of reaction chambers, each containing a different specific biochemical reagent. The presence or absence of each reaction is...
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4037084 |
Decompression plan calculator
A decompression calculator for calculating safe and efficient diving schedules utilizing unequal time constants for uptake and elimination of inert gas in the diver's tissues. Scales are provided...
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4006345 |
Scheduling tool
A scheduling tool for establishing estimated duration of a contractual obligation involving multiple phases and associated functions thereof is utilized with a normalized scale and various overlays...
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3916161 |
Hexidecimal to binary conversion device
A plurality of conversion slides are positioned moveably in a holder. The lder has slots whereby the hexidecimal number can be read from the slide and its equivalent binary number may be read...
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3906193 |
Mathematical calculating
The invention is a numerical calculator with which one can perform the mathematical operations multiplication, division, ratios, etc. The calculator operates by the combined use of an abscissa...
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3784093 |
FACTORMATIC SLIDE RULE
A slide rule extending the physical dimensions and calculating capacity of a logarithmic scale comprising a frame having start-answer index lines at its respective ends slidably supporting a slider...
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3639733 |
NEGATIVE LOGARITHM-DECIMAL CONVERSION
Devices preferably having two scales which relate whole number negative logarithms to a negative power of 10 which is one more than the whole number, and two scales which relate logarithms less...
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3627199 |
ANNEALING TIME CALCULATOR
A calculator for determining the minimum length of time to operate an annealing furnace, such as a hood or bell-type, to anneal a charge of coils of strip metal, some of which may have different...
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3609316 |
COMPOSITE MIXTURE BATCHING
The present disclosure is directed to a method of using an analogue computing device for proportioning a plurality of components of a batch mixture in obtaining a composition exhibiting desired...
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3604620 |
CALCULATOR FOR DIFFERENT NUMERICAL BASES
A calculating device for adding and subtracting quantities in at least two different base numerical systems of a type which has a plurality of sliding members for registering quantities which can...
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3502264 |
APPARATUS FOR DISPLAYING MOMENTS SHEARING FORCES ETC. ON BOARD SHIPS
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3493171 |
PORTABLE CALCULATOR
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3491460 |
MATHEMATICAL INSTRUCTIONAL DEVICE
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RE11450 |
Title is not available
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RE13052 |
Title is not available
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3481537 |
EASY CALCULATOR
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3451619 |
CHECK DIGIT CALCULATOR
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3272431 |
Fraction-decimal calculator
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3213544 |
Instrument for computing time of arrival at a destination
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3059522 |
Range finder height computer
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3033451 |
Slide rule for ascertaining the divisibility of numbers and for the resolution into prime number factors of such numbers
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3022001 |
Multi-scaled slide rules
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2988273 |
Counter device
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2983447 |
Slide rule and adding device combination
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2952461 |
Travel game with non-losable parts
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2863664 |
Game
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2848164 |
Computer slide rule for automatic screw machine
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2828915 |
Slide rule
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