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  1. 03-04-14, 04:18 AM #3
    Pschiffe
    Pschiffe is offline Member
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    Quote Originally Posted by Ryan Krakowsky View Post
    Here's the patent:

    US 570032 A

    Review of Patent No. 570,032 reveals it was issued Oct. 27, 1896. Inventor was John Luebbers of Cincinnati, Ohio and it was assigned to J.B. Schroeder & Co. also of Cincinnati, OH. They were an old time lock manufacturer from that era but I have little information on them. I did find some reference to old Schroder sectional key blanks from Ilco and Graham but nothing like the cylinder image or patent. See thumbnail attached.

    Pete Schifferli
    Attached Thumbnails Attached Thumbnails SchroderKeyways.jpg  
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