“Electronic educational device”

Data:

• The Lafayette Alumnus 42(4) from April 1, 1971, page 48 states: “An electronic educational device designed to teach students how to use the slide rule was invented by Dr. Saul Barron, a professor at the University of Buffalo.”
• This is not an April Fool's joke: The Ohio State University Monthly (October 1970) page 36, has a similar statement: “Saul Barron, MSc, PhD '54, chemistry professor, State University College of New York, Buffalo, has developed an electronic large scale slide rule for instructional use.”
• Note: this has no relation to Barron's Educational Series Inc, which issued, a.o., a paperboard Metric Converter slide rule around 1976.
• Some biographical information on Dr. Saul Barron:
  ChE Alumni News, Ohio State University 5(1) (2001) page 13:
  Alumni update 1948: Saul Barron, Ph.D., is a Professor Emeritus from State University of New York, and he also taught at Trenton Junior College and Johns Hopkins University. He worked for 25 years as a research consultant to Conax Buffalo. He has written over 120 technical papers and a textbook, and has published many articles in technical journals. Saul is a member of numerous professional organizations, received the Distinguished Service Award from Villa Maria College of Buffalo, NY, and most recently was elected vice president of the Technical Societies Council of Buffalo, NY. In addition, he invented an electronic teaching slide rule. He is semi-retired in Florida where he lectures and does occasional consulting on projects. He has three children and five grandchildren.
  legacy.com:
  Saul Barron, died May 20, 2007 in Florida, worked at Department of Chemistry at Buffalo State College from 1968 to 1995.

Questions:

1. What was this electronic educational device? An electronic slide rule simulator? Or a motor-driven slide rule like Cliff Stoll's?