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The Einstein–Szilard or Einstein refrigerator is an absorption refrigerator which has no moving parts, operates at constant pressure, and requires only a heat source to operate. It was jointly invented in 1926 by Albert Einstein and his former student Leó Szilárd , who patented it in the U.S. on November 11, 1930 ( U.S. patent 1,781,541 ).
Marcel Audiffren was a French priest, physicist, and inventor who promoted the residential refrigerator. He served as abbot of his Cistercian monastery, and originally designed a hand-cranked device for cooling liquid, such as wine, for his monks. His machine was patented in France in 1894.
The Einstein refrigerator is invented by Albert Einstein and Leo Szilard. Ulster-born engineer Harry Ferguson is granted a British patent for his 'Duplex' hitch linking tractor and plough. German engineer Andreas Stihl patents and develops an electric chainsaw. [21]
1926 – General Electric Company introduced the first hermetic compressor refrigerator; 1929 – David Forbes Keith of Toronto, Ontario, Canada received a patent for the Icy Ball which helped hundreds of thousands of families through the Dirty Thirties. 1933 – William Giauque and others – Adiabatic demagnetization refrigeration
As of February 2019, the trademark, reg. no. 4,829,304, remains "Issued and Active" at the U.S. Patent and Trademark Office. [33] Dumpster Trademark was cancelled in 2015. [34] [35] Trademarked by Dempster Brothers, Inc. in 1963, dumpster is originally a portmanteau of the word dump and the last name Dempster.
In the newly approved patent application, Amazon inventor Simon Kurt Johnston starts with the obvious: "Food or… Read More Amazon wins patent for spoilage-sniffing refrigerator … but don’t ...
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The Patent Act of 1836 (Ch. 357, 5 Stat. 117) further clarified United States patent law to the extent of establishing a patent office where patent applications are filed, processed, and granted, contingent upon the language and scope of the claimant's invention, for a patent term of 14 years with an extension of up to an additional seven years.