I am a nephew of Belle Kogan (1902-2000) and have her clipping files. I can probably supply the information you need, including references to bio summaries in recent books. Please describe what you need. I know that my aunt designed the Quacker clock for Warren Telechron in 1934, and also the Vedette. I have in the file a patent application #97,939, September 25, 1935, Serial No. 58,692 which shows another clock that she designed for Warren Telechron, and I have a picture of what looks like a wooden clock for Warren Telechron in 1934. Belle Kogan is considered to be the first American female industrial designer.