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Invidious > Channel > PatentYogi

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YT 1 minute 27 seconds PatentYogi August 29 -- TDIPH#1 -- Invention of Zipper YT 2 minutes 4 seconds PatentYogi September 10 -- TDIPH#4 -- Invention of Sewing Machine YT 1 minute 44 seconds PatentYogi September 4 -- TDIPH#3 -- Invention of Roll Film

YT 1 minute 27 seconds PatentYogi August 31 -- TDIPH#2 -- Kinetoscope YT 1 minute 16 seconds PatentYogi September 11 -- TDIPH#5 -- Mail chute YT 1 minute 20 seconds PatentYogi September 13 -- TDIPH#6 - Flexible photofilm

YT 2 minutes 30 seconds PatentYogi September 19 -- TDIPH#7 -- Carpet Sweeper YT 3 minutes 8 seconds PatentYogi September 26 -- TDIPH#8 -- Space Capsule Emergency Separation Device YT 1 minute 24 seconds PatentYogi November 9 -- TDIPH#9 -- First Design Patent