What does zippo lighter 4 1 mean?

Appearance patent. Zippo lighter 4 1 refers to pat2032695, which is an appearance patent applied by Zippo for the lighter of 4 1. Zippo, whose Chinese name is Zhibao, is a metal lighter produced by Zippo Company in the United States. Its characteristic is that Zippo's windproof technology can meet the needs of ignition at any time in any bad weather.