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
