Patents in Germany, USA and Canada

1. US Patent: US 6,462,858 (Oct. 8, 2002) and Canadian Patent: 2371415 (Feb 2002), "Fast Attenuator" (with Ian Mcdonald and Paul Colbourne)
   
2. German Patent 19716785.3, "Technique and Device of Interferometric Measurement of Displacement Derivatives on an Curved Object Surface" (with W. Steinchen, G. Kupfer & P. Maeckel) (1997)
   
3. German Patent 19640153.4, "Technique and Device of an Interferometer - a Combination of TV-Holography and TV-Shearography" (with W. Steinchen & G. Kupfer) (1996)
   
4. German Patent 19639213.6, "Shearing Interferometry for Vibration Analysis" (with W. Steinchen & G. Kupfer) (1996)
   
5. German Patent 19643443.2, "Mechanical Switch of Light Beam" (with W. Steinchen, P. Maeckel & G. Kupfer) (1996)
   
6. German Patent 4446887.3, "In-Plane Strain Measurement by Shearing-Interferometry" (with W. Steinchen, G. Kupfer & M. Schuth) (1994)
   
7. German Patent 4313459 "Technique, Device and Shearing Element of Speckle Shearing Interferometry (with W. Steinchen, G. Kupfer) (1993)