Patent of the Day: Dog Whistle
On this day in 1941, the patent application for Dog Whistle was granted. U.S. Patent No. 2,245,484
Patent of the Day: Pretzel Making Machine
On this day in 1915, the patent application for Pretzel Making Machine was granted. U.S. Patent No. 1,142,533
Patent of the Day: License Plate Holder
On this day in 1928, the patent application for License Plate Holder was granted. U.S. Patent No. 1,672,333.
Patent of the Day: Vending Machine
On this day in 1925, the patent application for Vending Machine was filed. U.S. Patent No. 1,689,039.
Patent of the Day: Baby Incubator and the Like
On this day in 1941, the patent application for Baby Incubator and the Like was granted. U.S. Patent No. 2,243,999.
Patent of the Day: Apparatus for Gathering Cranberries
On this day in 1885, the patent application for Apparatus for Gathering Cranberries was granted. U.S. Patent No. 319,352.
Patent of the Day: Pocket Letter Opener
On this day in 1948, the patent application for Pocket Letter Opener was granted. U.S. Patent No. 2,442,694.
Patent of the Day: Apparatus for Shaping Metal Objects by Means of Fluid Pressure
On this day in 1948, the patent application for Apparatus for Shaping Metal Objects by Means of Fluid Pressure was granted. U.S. Patent No. 650,755.
