Gate Marks

[M Garner]

did all cast iron cookware have gate marks before 1900?

[Doug D.]

If you mean bottom gate marks, not necessarily. Griswold was using side gating technology in the early 1880s; Wagner from 1891. Hard to say, though, who first came up with the idea of side gating and when.

[M Garner]

thanks Doug,,,,,,,,,,,