Frank E Cada

45464480, Oct 8, 1985

Sep 22, 1982

6/421591

Richard M. Spangler - Loveland CO
Eugene V. Burmeister - Loveland CO
Frank E. Cada - Loveland CO
Chris J. Christopher - Loveland CO
Wayne F. Covington - Loveland CO
Myles A. Judd - Loveland CO
Freddie W. Wenninger - Loveland CO
Robert E. Watson - Loveland CO
Kent W. Simcoe - Loveland CO

Hewlett-Packard Company - Palo Alto CA

G06F 302
G06F 906

364900

A programmable calculator utilizes an initialization key for setting all program variables, including array variables that are stored as part of a program in the calculator memory, to a predetermined initial value.

43228160, Mar 30, 1982

Jun 12, 1980

6/158675

Richard M. Spangler - Loveland CO
Eugene V. Burmeister - Loveland CO
Frank E. Cada - Loveland CO
Wayne F. Covington - Loveland CO
Chris J. Christopher - Loveland CO
Myles A. Judd - Loveland CO
Freddie W. Wenninger - Loveland CO
Robert E. Watson - Loveland CO
Kent W. Simcoe - Loveland CO

Hewlett-Packard Company - Palo Alto CA

G06F 313
G06F 302
G06K 1522

364900

An adaptable programmable calculator is provided by employing a modular read-write and read-only memory unit 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 capable of performing both serial binary and parallel binary-coded-decimal arithmetic, 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 with a plurality of alphanumeric keys, a magnetic tape cassette reading and recording unit capable of bidirectionally transferring programs and data between a magnetic tape and the calculator, and a solid state output display unit capable of displaying every alphabetic and numeric character and many other symbols individually or in combination. All of these input and output units are included within the calculator itself. An output printer, an X-Y plotter, a typewriter, a teletypewriter, a magnetic or paper tape reading and recording unit, an extended read-write memory unit, a magnetic disc reading and recording unit, a modem for connecting the calculator via telephone lines to a remotely located computer, and many other peripheral input and output units may also be employed with the calculator.

41268989, Nov 21, 1978

Jan 19, 1977

5/760802

Richard M. Spangler - Loveland CO
Eugene V. Burmeister - Loveland CO
Frank E. Cada - Loveland CO
Wayne F. Covington - Loveland CO
Chris J. Christopher - Loveland CO
Myles A. Judd - Loveland CO
Freddie W. Wenninger - Loveland CO
Robert E. Watson - Loveland CO
Kent W. Simcoe - Loveland CO

Hewlett-Packard Company - Palo Alto CA

G06F 1502
G06F 1100
G06F 304
G06F 1300

364900

An adaptable programmable calculator is provided by employing a modular read-write and read-only memory unit 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 capable of performing both serial binary and parallel binary-coded-decimal arithmetic, 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 with a plurality of alphanumeric keys, a magnetic tape cassette reading and recording unit capable of bidirectionally transferring programs and data between a magnetic tape and the calculator and, a solid state output display unit capable of displaying every alphabetic and numeric character and many other symbols individually or in combination. All of these input and output units are included within the calculator itself. An output printer, an X-Y plotter, a typewriter, a teletypewriter, a magnetic or paper tape reading and recording unit, an extended read-write memory unit, a magnetic disc reading and recording unit, a modem for connecting the calculator via telephone lines to a remotely located computer, and many other peripheral input and output units may also be employed with the calculator.

43665535, Dec 28, 1982

Oct 24, 1980

6/200281

Richard M. Spangler - Loveland CO
Eugene V. Burmeister - Loveland CO
Frank E. Cada - Loveland CO
Wayne F. Covington - Loveland CO
Chris J. Christopher - Loveland CO
Myles A. Judd - Loveland CO
Freddie W. Wenninger - Loveland CO
Robert E. Watson - Loveland CO
Kent W. Simcoe - Loveland CO

Hewlett-Packard Company - Palo Alto CA

G06F 3023

364900

An adaptable programmable calculator is provided by employing a modular read-write and read-only memory unit 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 capable of performing both serial binary and parallel binary-coded-decimal arithmetic, 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. Also the calculator may be operated manually by the user from an alphanumeric keyboard input unit or automatically by a program stored within the memory unit to perform calculations and provide an output indication of the results thereof. It may also be employed to load programs into the memory unit from the keyboard input unit. Also, the computer language allows the user to enter a line comprising an alphanumeric statement into the calculator from the keyboard input unit while visually observing an alphanumeric display of that line to check for errors therein, permitting the user to cause the entered lines to be immediately executed by the calculator or stored as part of a program within the memory unit, and permitting the user to subsequently recall the executed or stored line so that it may be reinspected, reevaluated, and, if necessary, edited and executed or re-executed, or restored in edited form.

41278976, Nov 28, 1978

Jan 19, 1977

5/760801

Richard M. Spangler - Loveland CO
Eugene V. Burmeister - Loveland CO
Frank E. Cada - Loveland CO
Wayne F. Covington - Loveland CO
Chris J. Christopher - Loveland CO
Myles A. Judd - Loveland CO
Freddie W. Wenninger - Loveland CO
Robert E. Watson - Loveland CO
Kent W. Simcoe - Loveland CO

Hewlett-Packard Company - Palo Alto CA

G06F 300
G06F 502
G06F 302

364900

An adaptable programmable calculator is provided by employing a modular read-write and read-only memory unit 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 capable of performing both serial binary and parallel binary-coded-decimal arithmetic, 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 with a plurality of alphanumeric keys, a magnetic tape cassette reading and recording unit capable of bidirectionally transferring programs and data between a magnetic tape and the calculator, and a solid state output display unit capable of displaying every alphabetic and numeric character and many other symbols individually or in combination. All of these input and output units are included within the calculator itself. An output printer, and X-Y plotter, a typewriter, a teletypewriter, a magnetic or paper tape reading and recording unit, an extended read-write memory unit, a magnetic disc reading and recording unit, a modem for connecting the calculator via telephone lines to a remotely located computer, and many other peripheral input and output units may also be employed with the calculator.

40127257, Mar 15, 1977

May 30, 1974

5/469727

Richard M. Spangler - Loveland CO
Eugene V. Burmeister - Loveland CO
Frank E. Cada - Loveland CO
Wayne F. Covington - Loveland CO
Chris J. Christopher - Loveland CO
Myles A. Judd - Loveland CO
Freddie W. Wenninger - Loveland CO
Robert E. Watson - Loveland CO
Kent W. Simcoe - Loveland CO

Hewlett-Packard Company - Palo Alto CA

G06F 1540
G06F 1502
G06F 314
G06F 738

3401725

An adaptable programmable calculator is provided by employing a modular read-write and read-only memory unit 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 capable of performing both serial binary and parallel binary-coded-decimal arithmetic, 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 with a plurality of alphanumeric keys, a magnetic tape cassette reading and recording unit capable of bidirectionally transferring programs and data between a magnetic tape and the calculator and, a solid state output display unit capable of displaying every alphabetic and numeric character and many other symbols individually or in combination. All of these input and output units are included within the calculator itself. An output printer, an X-Y plotter, a typewriter, a teletypewriter, a magnetic or paper tape reading and recording unit, an extended read-write memory unit, a magnetic disc reading and recording unit, a modem for connecting the calculator via telephone lines to a remotely located computer, and many other peripheral input and output units may also be employed with the calculator.