Company Filing History:
Years Active: 1976-1986
Title: Douglas M. Clifford: Innovator in Programmable Calculators
Introduction
Douglas M. Clifford is a notable inventor based in Loveland, CO (US). He has made significant contributions to the field of electronic calculators, holding a total of 6 patents. His work has paved the way for advancements in programmable calculator technology.
Latest Patents
Among his latest patents, Clifford has developed a programmable calculator that includes means for digitizing the position of various input devices. This electronic calculator features modular read-write and read-only memory units, a central processing unit, an output display unit, an output printer unit, and a keyboard input unit. The design allows for the connection of peripheral input/output units, such as an X-Y plotter. Users can input commands to move the plotter pen to an arbitrary position, enabling the calculator to determine and display the X and Y coordinates of that position.
Another significant patent involves an adaptable programmable calculator that employs modular memory systems. This calculator is designed to be expandable, providing additional program and data storage functions tailored to the user's environment. It includes an LSI NMOS central processing unit and a peripheral interface adaptor that facilitates bidirectional information transfer. The input/output units consist of a keyboard with alphanumeric keys, a magnetic tape cassette reading and recording unit, a gas discharge display, and a thermal printer. The calculator also features an auto start mode, allowing programs stored on external magnetic media to be automatically loaded and executed upon powering on.
Career Highlights
Douglas M. Clifford has had a distinguished career at Hewlett-Packard Company, where he has contributed to the development of innovative electronic devices. His work has significantly impacted the functionality and usability of calculators in various applications.
Collaborations
Throughout his career, Clifford has collaborated with notable colleagues, including John C. Keith and Freddie W. Wenninger. These collaborations have further enhanced the development of advanced technologies in the field of electronic calculators.
Conclusion
Douglas M. Clifford's contributions to programmable calculators have established him as a key figure in the field of electronic innovation. His patents reflect a commitment to enhancing user experience and functionality in technology.
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