Dennis Brown (born 1943) was a letter engraver who started
his career in 1967 at the United States Bank Note Company. In 1971, he moved to
the Federated Bank Note Company and in 1974 he joined the Bureau of Engraving
and Printing (BEP).
From the mid 1980s, he would also engrave the lettering on a good number of commemorative stamps, the last of which would appear in 1994, a single stamp marking the birth centenary of the writer and cartoonist James Thurber.
You will find Dennis Brown's database HERE.