For the first date, I did a search for 3/5/1889 (instead of 3/6) and a US classification code of 70/$ (locks) but none of the patents looked terribly relevant. I could certainly be wrong.

The second date probably refers to US patent 421,905 by Charles M. Burgess, assigned to Russell & Erwin, but is merely for a sheet metal latch case. It makes reference to an earlier patent 399,240 of March 12, 1889. This is also by Burgess and is a Russell & Erwin assignment.