"Trusting the great potential in his hypothetical invention, he immediately set out to conduct some market research. He put together a brief questionnaire “for

"Trusting the great potential in his hypothetical invention, he immediately set out to conduct some market research. He put together a brief questionnaire “for the purpose of determining a thickness of slice which would be most nearly universal in acceptance,” and placed it as an ad in several large newspapers. Over the course of a few months, he managed to cull responses from 30,000 housewives. Armed with this knowledge, he embarked on a long, painful journey to bring his invention to life." Talk about validating your idea! I found it amazing this guy was doing what we recently discovered, back in early 1900's