Boots – shoes – and leggings
Patent
1977-06-01
1979-12-11
Malzahn, David H.
Boots, shoes, and leggings
G06F 302
Patent
active
041786335
ABSTRACT:
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, a central processing unit, and an input-output control unit capable of bidirectionally transferring information between the memory or central processing units and a number of input and output units. The memory, central processor, and input-output control units are controlled by a microprocessor included in the central processing unit. The input and output units include a keyboard input unit having a plurality of alphabetic, numeric, and funtion keys for entering alphameric information, including algebraic statements, into the calculator, a magnetic card reading and recording unit capable of bidirectionally transferring information between an external magnetic card and the calculator, a solid state display unit capable of displaying every alphabetic and numeric character and many other symbols individually and in a line of one or more alphameric statements, and a printer unit capable of printing on thermally sensitive paper every alphabetic and numeric character and many other symbols individually and in alphameric statements or messages. At least one of the function keys of the keyboard input unit is a dual function key. One of the dual functions is selected by actuating the key once, and the other one of the dual functions is selected by actuating the key twice.
REFERENCES:
patent: 3597600 (1971-08-01), Herendeen et al.
patent: 3762637 (1973-10-01), Hernandez
patent: 3859635 (1975-01-01), Watson et al.
Covington Wayne F.
James Rex L.
Larson Ivar W.
Olander Jr. Emil E.
Russell Homer C.
Hein William E.
Hewlett--Packard Company
Malzahn David H.
LandOfFree
Programmable calculator including multifunction keys does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Programmable calculator including multifunction keys, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Programmable calculator including multifunction keys will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-313670