Heyman L. Lipman was the first to apply for a patent (1858) with a means of securing an eraser to a pencil. Is this the same H.L. Lipman who was known for "Lipman's postal cards" in the 1860s?

gtho4

According to this article, it's the same person: Sensing a business opportunity in letting the public send quick cheep notes, John P. Charlton of Philadelphia took advantage of the new post card law and copyrighted America’s first postcard in 1861. The original card consisted of a simple design; a few lines for an address, a stamp box, and the copyright date, all printed in a three color selection. It was marketed as a way to stay in touch with family and an inexpensive means of advertising, all for half the cost of a letter. None of these cards were ever used to anyone’s knowledge. Hymen L. Lipman was a man in search of opportunity. He bound a rubber eraser to the back end of a pencil and tried to patent it in 1858. After his rejection by the Patent Office he took the battle up to the Supreme Court where it was denied on the grounds he did not create a new use for two old inventions. It is uncertain when Lipman met John Charlton, but they were in business together when a second series of cards were introduced carrying the name Lipman’s Postal Card. The earliest known postmark on these cards is of October 25, 1870 from Richmond, Indiana. This time the front contained a pictorial advertisement of an Esterbrook Steel Pen. It was the first authorized illustrated postcard to be sent though the United States mail but it soon became obsolete when the Government released its own postal card. It does not appear that Lipman ever received his requested patent for this idea either. http://www.metropostcard.com/history1848-1872.html May 22 10, 6:44 PM