This one isn’t too obscure, but Leonard’s rendering of the company name is idiosyncratic:
“You cut the wire,” Donnell said.
“Is that all?” Chris brought out the Spyder-Co knife that was always in his right-hand coat pocket. “Here, you do it.”—Elmore Leonard, Freaky Deaky, p. 219
Chris handles his Spyderco knife at least two other times in the course of the book. The company is still in business. I don’t know whether its cult following was stronger in the last 80s, when this book appeared, or now. I suspect that Chris carries a Leatherman tool now.