"United States Locking Device Patents"

The offline database currently contains approximately 36,000 patents consisting of classes 70/$, D8/330 thru D8/348. This data was loaded using automated software tools with total disregard to any errors that might occur in the USPTO database. These errors will be corrected as they are identified.

Patents issued thru 12/31/1970 (approximately) have a list of classes which includes the current class that the patent is assigned to. This data is current as of 1/3/2007, and will be updated periodically. Patents issued after 12/31/1970 have the SQL key word search string. This being said we do not have the current class for these patents.

The CCL shown is the current classification.

Please be aware that some padlocks bear patent dates that will not appear in the patent list. This is because the date refers to a mechanism not a padlock. In other cases the padlock patent date is not present and in its place is the earlier mechanism patent date. This is true with the William M. Brooke Patent #'s 297749 465450 and Image. A future endeavor will be to identify these patents and include them in the list.

The Patent Office may change their means of access without any notice which may cause retrieval of the patent to fail. Should this happen let us know and we will make the necessary changes. The US Patent Office stores patents in TIFF format. To view the specifications and required software click here. Foreign Patent Offices will have their own specifications.

Alphabetic lists contain an entry for all Inventor and/or Assigned to names.