Detroit artist and quizmaster Grant Hayes displays his Jesus Christ Board of Knowledge in this 1981 photograph by news photographer David Belanger (a working photographer with better than average skills, actually) in Detroit. Mr. Hayes registered his invention, but I don't think much came of it. Note the Knowledge board is titled "Teacher's Tool and Learner's Delight" atop. As you can see, Mr. Hayes was running a contest.
Original Press Photograph by David Belanger 1981 collection Jim Linderman