Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Prefabricated portable tornado shelter










Image Number 3 for United States Patent #6151841.

An inexpensive, prefabricated portable tornado shelter is disclosed. The shelter is assembled from four equilateral triangular sides, a base frame, and a floor, to form a square pyramid-shaped enclosure with latched doors and PLEXIGLAS windows. The shelter allows constant air pressure equalization between its interior and exterior. The shelter is held firmly to the ground with four auger bolts.








 
 
  Recently Added Patents
Process for the enzymatic reduction of enoates
Canopy light fixture
Method and structure for adding mass with stress isolation to MEMS structures
Media processing method and device
Stroboscopic light source for a transmitter of a large scale metrology system
Anti-infective derivatives, method for the production thereof, pharmaceutical compositions containing same and uses of said derivatives in treatment
Buck converter having reduced ripple under a light load
  Randomly Featured Patents
Semiconductor device and method of manufacturing the same
Pressure filter adapter and containment vessel
Control and monitoring system for gas burners
Article highly resistant to corrosion by gallium phosphide and gallium arsenide
Snap-shut stopper having a projecting tab for a container neck
Leak-proof alkaline cell
Frosted beverage chilling and dispensing device and system
Copper-tin-titanium alloy
Liquid cleansing compositions
Process for manufacture of low voltage power MOSFET device