"Kosher Patents" is a book all about inventions that have made living a Jewish life fun, easy, and more enjoyable. Included are patents for bagel slicers, mezuzah cases, Shabbat elevators, kosher slaughter apparatuses, athletic style tallitot, and even a magic compass that points toward Jerusalem. All these inventions have been submitted to patent offices around the world. You'll wonder, "Why didn't I think of that "