Supposedly the last two letters were transposed by the Post Office during the application process.
His father worked full-time for the United States Post Office Department starting at 4 a.m., then taught or played golf until dark, weather permitting.
It took over the building and operation of the nation's system of lighted airways, a task that had been begun by the Post Office Department.
In 1962, to prevent people profiting from the issue of an invert stamp error, the United States Post Office Department intentionally reprinted 40,270,000 copies the yellow Dag Hammarskjöld invert stamp.
The MB-4 was designed to meet a June 1919 specification from the United States Post Office Department for a two- or three-engined mailplane, required to carry 1,500 lb (682 kg) of mail on a single engine.
The Postal Service Act signed by President George Washington on February 20, 1792, established the Department.
He served much of his life as chief clerk in the offices of the U.S. Post Office Department.
In May 1965, the train lost the Canada Post mail contract for the Emerson–Winnipeg run, and the following month the United States Post Office pulled the US mail off the train as well.
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Alder railroad station on Southern Pacific's Toledo Line (now owned by the Portland and Western Railroad) was established in 1911, but in 1922 the Post Office Department would not name the community's new post office "Alder" because of potential confusion with many other offices with the same name.
When the Post Office required the community to be renamed, residents chose the name of the spa town of Karlsbad in Bohemia, after local wells were discovered to yield mineral water.
He is also known for competing with the U.S. Post Office with his American Letter Mail Company, which was forced out of business by the United States government.
After a campaign of harassment from the U.S. Post Office Department and the Federal Bureau of Investigation, the Postmaster of Los Angeles declared the October, 1954 issue obscene therefore unmailable under the Comstock laws.