Vacuum excavation apparatus having an improved air lance, air lance nozzle, and vacuum system including a multistage venturi ejector
A Standard patent application filed on 04 March 1998 credited to Hayes, Paul

Details

Application number :
66739  
Application type :
Standard  
Application status :
LAPSED  
Under opposition :
No  
Proceeding type :
 
Invention title :
Vacuum excavation apparatus having an improved air lance, air lance nozzle, and vacuum system including a multistage venturi ejector  
Inventor :
Hayes, Paul  
Agent name :
 
Address for service :
 
Filing date :
04 March 1998  
Associated companies :
 
Applicant name :
Hayes, Paul  
Applicant address :
 
Old name :
 
Original Source :
Go  

Same Inventor