Thermoacoustic Refrigeration at Penn State

Thermoacoustics Patents

Patents and patent application are available at the United States Patent and Trademark Office web site.

S. L. Garrett, “Cylindrical spring with integral gas seal,” US Pat. No. 6,755,027 (June 29, 2004).
M.E. Poese, R. W. M. Smith, R. S. Wakeland and S. L. Garrett, “Bellows bounce thermoacoustic device,” US Pat. No. 6,792,764 (Sept. 21, 2004).
R. W. M. Smith, M. E. Poese, S. L. Garrett and R. S. Wakeland, “Thermoacoustic device,” US Pat. No. 6,725,670 (Apr. 27, 2004).
S. L. Garrett, R. M. Keolian and R. W. M. Smith, “High-efficiency moving magnet loudspeaker,” U. S. Pat. No. 6,307,287 (Oct. 23, 2001).
S. L. Garrett, “Torsionally resonant toroidal thermoacoustic refrigerator,” U. S. Pat. No. 5,953,921 (Sep. 21, 1999).
S. L. Garrett, “Passive frequency stabilization of an acoustic resonator,” U. S. Pat. No. 5,857,340 (Jan. 12, 1999).
S. L. Garrett, “High power thermoacoustic refrigerator,” U. S. Pat. No.5,647,216 (July 15, 1997); South African Letters Patent No. 96/6512 (31 July 1996); Indian Pat. App. No. 1686/Del/96, pending.