Door handgrip with fingerprint recording surface

作者: Benjamin J. Perkinson

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摘要: A door handgrip having means for obtaining a fingerprint of the next person using door, as bank robber or law breaker. For this purpose grip is provided with pair fingergrip surfaces one which in normal use and other print-free normally shielded from use. Remote control operable to replace used gripping surface thereby obtain fingerprints grip.

参考文章(2)
Archibald C Beeman, Extension for handles ,(1919)
John H Pineo, Fastening device for doors ,(1916)