Boots – shoes – and leggings
Patent
1990-08-20
1993-11-23
Black, Thomas G.
Boots, shoes, and leggings
36470902, 36470915, 434282, 434298, G06F 1532, G06F 1520
Patent
active
052650294
ABSTRACT:
A chemical calculator providing rapid and convenient ways to retrieve information and perform calculations of chemical elements and chemical formulas obtained by direct entry from a periodic table keypad. Chemical element data, such as atomic number and mass, or calculated data (e.g. bond distance) of element pairs are displayed on an LCD or CRT screen when element keys are selected. Chemical formulas can be written when element, numerical or formulaic keys are pressed. The "Enter" command results in the display of the chemical formula's condensed formula, formula weight and percentage composition. Other function modes permit additional transformations, reaction yields and limiting reactants and empirical formula determinations.
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Black Thomas G.
Chemical Concepts Corporation
MacKenzie Joseph C.
Marjama Owen D.
Pincelli Frank
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