System for bandwidth allocation in a computer network
William Welch, Steven McCanne and Abhay K. Parekh
U.S. Patent 6,735,633. May 2004

Method and system for implementing multiple leaky bucket checkers using a hybrid synchronous/asynchronous update mechanism
Paul Chang, Roch A. Guerin, Abhay Kumar Parekh and James Thomas Rayfield
U.S. Patent 5,835,711. November 1998