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
Discharge lamp comprising coated electrode
Nacelle cover
Mobile terminal and method for changing page thereof
Substantially aligned boron nitride nano-element arrays and methods for their use and preparation
Domestic soda-water preparing device
Optical packet signal transmission device and WDM optical communication network
Power supply architecture system designer
  Randomly Featured Patents
Disposable bib
Permalloy sensor having individual permalloy resist pattern runners with lengths perpendicular to a wafer level anisotropy
Straight cut coater unwind knife
Communication system allowing users to know online or network status of sought users
Pet registration, search, and retrieval system with municiple licensing option
Sport glove
Mobile power crane-excavator with open gear greasing
Rotary coating apparatus
Process of manufacturing a semiconductor device by filling a via hole in an interlayered film of the device with wiring metal
Writing instrument