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.

System and process for solid-state deposition and consolidation of high velocity powder particles using thermal plastic deformation

Tapphorn, Ralph M.
US Patent Application 20020168466.

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.