On this day in 1940 a patent for “Leakproof Dry Cell” was issued
(Patent No. 2,198,423)

04/23/2014
04.23.1940_Dry Cell Battery_US2198423A

On this day in 1884 a patent for “Slashed Metallic Screening” was issued
(Patent No. 297,382)

04/22/2014
04.22.1884_Screening_US0297382A

On this day in 1857 a patent for “Bustle” was issued
(Patent No. 17,082)

04/21/2014
04.21.1857_Bustle_ US0017082A

On this day in 1922 a patent for “Fountain Pen” was issued
(Patent No. 1,412,930)

04/18/2014
04.18.1922_Fountain Pen_US1412930A

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