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1900s: Carl Akeley develops method for spraying plaster onto wire frames.
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1910: First Cement Gun introduced at New York Concrete Show.
![](/documents/20127/121945/US_history_01.jpg/6a090fe8-50e8-eab5-78d7-8893c22c1729?t=1581436362214)
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1911: Patents and trademarks issued for the Cement Gun and its Gunite process.
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1913: Cement Gun used to seal walls on the Panama Canal.
![](/documents/20127/121945/US_history_02.jpg/5a792a70-fada-323c-3e17-585770c02436?t=1581436362480)