Patent of the Day: Hydraulic Air Compressor
On this day in 1904 John Homer Alexander was granted the patent for Hydraulic Air Compressor. U.S. Patent No. 763.239. The object of this invention is to provide an improved apparatus for compressing…
Patent of the Day: Grave Alarm
On this day in 1893 August Lindquist was granted the patent for Grave Alarm. U.S. Patent No. 500,072. This invention relates to improvements in grave alarms, whereby persons who are prematurely…
Patent of the Day: Bi-Telephone
On this day in 1891 Ernest Jules Pierre was granted the patent for Bi-Telephone. U.S. Patent No. 454,138. This invention relates to an improvement in telephone-receivers, and has for its objects,…
Patent of the Day: Mouse Trap
On this day in 1943 Henry Peterson was granted the patent for Mouse Trap. U.S. Patent No. 2,321,617. The object of this invention is to provide a mouse trap made of metal, for sanitary reasons, and…
Patent of the Day: Combination Shoulder and Lap Safety Belt (seat belt)
On this day in 1955 Roger W. Griswold II et al, were granted the patent for Combination Shoulder and Lap Safety Belts. U.S. Patent No. 2,710,649. This invention relates to combined shoulder and lap…
Patent of the Day: Circuit Breaker and Closer for Alternating Currents
On this day in 1905 Andrew Gray was granted the patent for Circuit Breaker and Closers for Alternating Currents. U.S. Patent No. 792,020. This inventions relates to circuit-closers for heaving…
Patent of the Day: Method of Gravity Liquid Separation of Solids
On this day in 1913 Francis I. DuPont was granted the patent for Method of Gravity Liquid Separation of Solids. U.S. Patent No. 1,064,459. In this improved method a liquid other than water which is…
Patent of the Day: Job-Printing Press
On this day in 1903 Frank W. Pohl was granted the patent for Job-Printing Press. U.S. Patent No. 730,396. This invention relates to job-printing presses, and its object is to produce a job-press…
Patent of the Day: Alarm Clock
On this day in 1909 Hiram Phelps Arms was granted the patent for Alarm Clock. U.S. Patent No. 924,127. The object of the invention is to provide a simple and cheap alarm clock which may be placed…
Patent of the Day: Respirator
On this day in 1892 Gustave Pozdena was granted the patent for Respirator. U.S. Patent No. 476,486. This invention relates to that class of devices used in protecting the respiratory organs from…
Patent of the Day: Sleeping Bag
On this day in 1942 Eddie Bauer filed the patent for sleeping bag. The patent was later granted on January 4, 1944 as U.S.Patent No. 2.338.226. It is well known that the sleeping bad or sleeping…
Patent of the Day: Beer Pump
On this day in 1886 Mark L. Deering was granted the patent for Beer Pump. U.S. Patent No. 342,901. This invention relates to improvements in beer-pumps in which a faucit made double or quadruple, as…