Location History:
- Northfield, MN (US) (1980)
- Sturgis, SD (US) (1987)
- Eureka, CA (US) (1992)
- Charlotte, NC (US) (2002)
- Detroit, MI (US) (2006)
- London, KY (US) (2016)
- Richardson, TX (US) (2019)
Company Filing History:
1 out of 1 
1 out of 2,350 
1 out of 1,130 
Years Active: 1980-2019
Title: The Innovative Contributions of Donald L. Allen
Introduction
Donald L. Allen is a notable inventor based in Eureka, California, recognized for his significant contributions to technology through his seven patents. His work primarily focuses on advancements in programmable RF attenuators and systems for mining equipment.
Latest Patents
Among his latest patents is the "Compensated Programmable RF Attenuator." This invention features a programmable RF attenuator that provides RF attenuation based on a control signal. It includes a first RF attenuator circuit and a reactance compensation circuit, which helps maintain attenuation flatness. Another notable patent is the "Belt Delivery and Removal System," designed to transport, install, and remove belts used in mining equipment. This system comprises a frame, a deck, and a winder that facilitates the winding and unwinding of the belt.
Career Highlights
Throughout his career, Donald L. Allen has worked with various companies, including Don Allen, Inc. His innovative designs and solutions have made a significant impact in the fields he has engaged with.
Collaborations
Donald has collaborated with notable individuals such as John R. Olari and Daniel J. Armour, contributing to the development of his inventions.
Conclusion
Donald L. Allen's inventive spirit and dedication to innovation have led to advancements that benefit various industries. His patents reflect a commitment to improving technology and efficiency in practical applications.