D. G. Sun, T. J. Hall, "Micro-size optical switch with silicon-on-insulator waveguide corner mirror", Provisional Patent Application, Dec 2009.
T. J. Hall, S. A. Paredes, S. Taebi Harandi, "Compact Load-balanced Switch Structures for Packet Based Communication Networks", US Patent, International publication number: WO 2006/063459 A1, International publication date: 22 June 2006.
T. J. Hall, "IP-capable switch", April 2002, UK Patent Application GB0208797.1
T. J. Hall, "Optical crossbar switch", August 2001, UK Patent Application, GB0126822.6
A. Vilches, T. J. Hall, R. Loga, "Optoelectronic detector and related circuit", May 2001, UK Patent Application GB0030539.1, GB0108626.3, International Patent Application PCT/GB01/05527, Published as WO 02/49120 A1.
T. J. Hall, "Optical Transpose System", 16 August 2000, UK Patent Application GB0020046.9, International Patent Application PCT/GB01/03643,.Published as WO02/15633 A1.
R.W. A. Scarr, W. A. Crossland, T. J. Hall, M.A. Hands, M. H. George, R. G. Hoptroff, T. Wilkinson, "Router", 16 July 1999, UK Patent Application GB 99/16680.3, (now at PCT stage).
T. J. Hall, M. van Daalen, "Massively parallel computation using percolation networks", UK Patent Application GB9420449.2, 11 Oct. 1994. (lapsed)