There is one approved patent and two PCTs in process.
A search report has been received regarding the PCT's and is under review

• Aproved: Seifert, A., Paster, S., "Method and mechanism for producing suction and periodic flow",
  US Patent 2006-0048829-A1, Granted 2005-click here for download- PDF
  
  
• PCT: Oscillating actuator device
  
  
• PCT: Application of device to truck trailers