|3380648||Reusable envelope||April, 1968||DeLyra||229/71|
|3221980||System for validating mail by postal certification||December, 1965||Mercur||229/71|
|2985464||Mailing instrument||May, 1961||McFarland||229/714|
|2825498||Mailing envelope||March, 1958||Alves||229/68.1|
|2804395||Envelopes and the like with remoistenable adhesive comprising polyvinyl alcohol||August, 1957||Boyajian||229/68.1|
|2035218||Direct by mail advertising device||March, 1936||Bloom||229/68.1|
|1988908||Mail covering||January, 1935||MacKinnon||229/71|
FIG. 1 is a front elevational view of a stampless envelope showing my new design; and,
FIG. 2 is a rear elevational view thereof.
It is understood that the sides of the envelope are of no substantial thickness.