His most notable accomplishment was turning his Romanian immigrant father's business from selling deli meats out of a wagon into Hebrew National Kosher Foods, an industry leader.
Leonard's revolutionary innovation consisted of packaging deli meats specifically for supermarkets.
This successfully expanded his customer base beyond Kosher Jews to the general public.
For instance, a humorous ad campaign from the 1940s featured a boy balancing a gigantic salami on his head.
A Tempo Books Original, it was published by Grosset & Dunlap, Inc in America and Canada Simultaneously and retailed for $.95.