Patents by Inventor Spencer Purves McLennan

Spencer Purves McLennan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Pick-resistant pin tumbler lock
    Patent number: 10280646
    Abstract: A pick-resistant pin tumbler lock having a first stage in which the pins may move but the plug cannot rotate, and a second stage in which the plug may rotate but the pins cannot move. Pin movement inhibitors prevent further movement of the pins once sufficient rearward force is applied to the lock, and a rotation inhibitor prevents rotation of the plug until after the sufficient rearward force is applied.
    Type: Grant
    Filed: February 12, 2017
    Date of Patent: May 7, 2019
    Assignee: Iris Business Intelligence Inc.
    Inventor: Spencer Purves McLennan
  • Pick-Resistant Pin Tumbler Lock
    Publication number: 20170234035
    Abstract: A pick-resistant pin tumbler lock having a first stage in which the pins may move but the plug cannot rotate, and a second stage in which the plug may rotate but the pins cannot move. Pin movement inhibitors prevent further movement of the pins once sufficient rearward force is applied to the lock, and a rotation inhibitor prevents rotation of the plug until after the sufficient rearward force is applied.
    Type: Application
    Filed: February 12, 2017
    Publication date: August 17, 2017
    Inventor: Spencer Purves McLennan