Brush -Sieve Powder-Fluidizing Apparatus for Feeding Nano-Size and Ultra-Fine Powders

Tapphorn, R. M. and Gabel, H., September 25, 2007
US Patent 7,273,075 B2

System and Process for Solid-State Deposition and Consolidation of High Velocity Powder Particles Using Thermal Plastic Deformation

Tapphorn, Ralph M. and Gabel, Howard July 12, 2005
US Patent 6,915,964 B2.

Powder Fluidizing Devices and Portable Powder-Deposition Apparatus for Coating and Spray Forming

Tapphorn, R. M. and Gabel, H., April 6, 2004
US Patent 6,715,640.

Powder Supply Device and Portable Powder Deposition Apparatus for Ultra-Fine Powders

Gabel, Howard. and Tapphorn, Ralph., 23 January 2003
WIPO Patent Application, WO 03-006172.

Apparatus and Process for Solid-State Deposition of High Velocity Powder Particles using thermal plastic deformation

Gabel, Howard. and Tapphorn, Ralph., 20 April 2002
WIPO Patent Application, WO 02-085532.

Coating or Ablation Applicator with Debris Recovery Attachment

Tapphorn, R. M. and Gabel, H., Jun. 13, 2000
US Patent 6,074,135.

Coating or Ablation Applicator with a Debris Recovery Attachment

Gabel, H. and Tapphorn, R. M., August 8, 1998
US Patent 5,795,626.