Boots – shoes – and leggings
Patent
1985-06-12
1987-08-25
Krass, Errol A.
Boots, shoes, and leggings
364709, 364715, G06F 1520, G06F 1532
Patent
active
046897534
ABSTRACT:
An electronic calculator having unique utility for computation in chemical stoichiometry is described. Push-bottom input keys for stoichiometry are labeled by chemical unit, each of said keys being juxtaposed to an LED indicator light, and said keys being apportioned by line segments on the keyboard into five functional groups. The stoichiometry keys utilize variable conversion factors input by the user to automatically effect arithmetic conversion of a number, input with its chemical unit, into the equivalent number having a different chemical unit, said units being implicitly displayed by illumination of appropriate LED's. For students and others, the invention greatly simplifies the task of computation in chemical stoichiometry.
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Conklin, David, Hewlett-Packard Users Library Program Number 326 C, Molecular Weight Calculator.
Manning, Christopher, Hewlett-Packard Users Library Program Number 2336C, Molecular Mass Calculator.
Juffernbruch Daniel W.
Krass Errol A.
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