Shuttle Model ULT-25N Patents

The Shuttle ultra-low freezer employs the M150A Humm™ free-piston Stirling engine which is protected by US and international patents described herein.

Additional patents that apply to this product are listed here:

  • Japanese Patent 4352459
  • US Patent 7,055,321
  • India application 1236/DEL/2005
  • Chinese Patent ZL10064868.9
  • European Patent 1596144
  • Japanese Patent 3607837