Penciptaan Pintu Elektronik George Devol


Selain terkenal dengan penciptaan robotic arm George Devol juga telah menghasilkan beberapa penciptaan lain lebih awal. Salah satunya adalah pintu elekterik. George Devol telah menjual hakcipta penghasilan pintu elektrik kepada syarikat The Yale & Towne. Yale kemudiannya menghasilkan produk pintu elektrik dengan jenama Phantom Doorman sekitar tahun 1939-40.

Lima hasil pencitaan George Devol boleh baca di sini - link.

Iklan pintu eletrik produk Yale - the Phantom Doorman

source: wiki (link dan link2)

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source: semantic (link)

Sedikit info boleh dibaca dari queenslibrary - link.

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