Boots – shoes – and leggings
Patent
1976-08-23
1978-03-07
Nusbaum, Mark E.
Boots, shoes, and leggings
364709, 340324R, 340365R, 340365S, 200 5R, 200159B, 235145R, G06F 302, G06F 738
Patent
active
040782573
ABSTRACT:
A calculator system having a transparent keyboard includes an apparatus for electronically labeling the keyboard by displaying alphanumeric symbols through the keyboard. The apparatus comprises a keyboard selection device and a liquid crystal keyboard display device having a predetermined number of display planes each containing preselected symbols. The keyboard selection device operates both as a selection device and as an annunciator-feedback device, for selecting the symbols or legends of a given plane to label or configure the keyboard, and for feeding back to a user of the system the status of the selection device when it is activated. An alternative embodiment of the invention utilizes light-emitting diodes (LED's) for labeling the keyboard.
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patent: 3934242 (1976-01-01), Mueller
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patent: 4002892 (1977-01-01), Zielinski
Hewlett--Packard Company
Hulse Robert S.
Nusbaum Mark E.
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