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Forum: US Patent Specifications

US Patent Specifications on locks and security devices - For Reference, Research and Discussion.

Note: In this special sub-forum start a new thread for each new Patent Number.

  1.   Sticky Threads  

  2. Sticky Thread Sticky: US Patents

    Started by Librarian, 02-06-12 02:58 PM
    • Replies: 1
    • Views: 6,768
    Vaughan Armstrong
    09-01-17, 07:54 AM Go to last post

  3.   Normal Threads  

  1. 1960 - 2938374

    Started by Librarian, 02-06-12 05:27 PM
    4 Attachment(s)
    • Replies: 0
    • Views: 5,464
    Librarian
    02-06-12, 05:27 PM Go to last post

  2. 1958 - 2858691

    Started by Librarian, 02-06-12 05:26 PM
    3 Attachment(s)
    • Replies: 0
    • Views: 4,927
    Librarian
    02-06-12, 05:26 PM Go to last post

  3. 1957 - 2779185

    Started by Librarian, 02-06-12 05:26 PM
    6 Attachment(s)
    • Replies: 0
    • Views: 5,059
    Librarian
    02-06-12, 05:26 PM Go to last post

  4. 1939 - 2152258

    Started by Librarian, 02-06-12 05:17 PM
    6 Attachment(s)
    • Replies: 0
    • Views: 5,052
    Librarian
    02-06-12, 05:17 PM Go to last post

  5. 1872 - 122991 - Budd - Improvements in Padlocks

    Started by Librarian, 10-01-17 06:39 AM
    1 Attachment(s)
    • Replies: 0
    • Views: 4,916
    Librarian
    10-01-17, 06:39 AM Go to last post

  6. 1871 - 116977, McWilliam, James. Improvements in Padlocks

    Started by Librarian, 26-01-17 06:40 PM
    2 Attachment(s)
    • Replies: 0
    • Views: 15,312
    Librarian
    26-01-17, 06:40 PM Go to last post

  7. 1863 - 39486 Improvement in Padlock

    Started by dleebrick, 09-01-17 02:42 AM
    3 Attachment(s)
    • Replies: 0
    • Views: 5,141
    dleebrick
    09-01-17, 02:42 AM Go to last post

  8. 1862 44101 Hasp for Trunk Lock by Conrad Liebrich of Philadelphia

    Started by dleebrick, 08-01-17 09:36 PM
    2 Attachment(s)
    • Replies: 0
    • Views: 4,995
    dleebrick
    08-01-17, 09:36 PM Go to last post

  9. 1854 - 10862 Liebrich Trunk Lock

    Started by dleebrick, 08-01-17 09:29 PM
    2 Attachment(s)
    • Replies: 0
    • Views: 4,687
    dleebrick
    08-01-17, 09:29 PM Go to last post

  10. 1852 Patent # 8775 Lock and Plate

    Started by dleebrick, 09-01-17 02:39 AM
    2 Attachment(s)
    • Replies: 0
    • Views: 4,752
    dleebrick
    09-01-17, 02:39 AM Go to last post

  11. 1849 Patent 6522 - Padlock with Key

    Started by dleebrick, 09-01-17 02:36 AM
    2 Attachment(s)
    • Replies: 0
    • Views: 5,159
    dleebrick
    09-01-17, 02:36 AM Go to last post

  12. 1848 - 5708

    Started by Librarian, 02-06-12 03:48 PM
    4 Attachment(s)
    • Replies: 0
    • Views: 5,088
    Librarian
    02-06-12, 03:48 PM Go to last post

  13. 1839 1355 Truck Lock by Conrad Liebrich of Philadelphia

    Started by dleebrick, 08-01-17 09:42 PM
    2 Attachment(s)
    • Replies: 0
    • Views: 4,686
    dleebrick
    08-01-17, 09:42 PM Go to last post

  14. 1833 - 7758x

    Started by Librarian, 02-06-12 03:38 PM
    1 Attachment(s)
    • Replies: 0
    • Views: 4,949
    Librarian
    02-06-12, 03:38 PM Go to last post

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