Resources Contact Us Home
Collapsible sofa bed mattress

Image Number 3 for United States Patent #5551104.

A mattress of a sofa bed contains a portion which is collapsible and portions which are conventional and non-collapsible. The collapsible and non-collapsible portions are hinged to fold within a sofa bed frame.

  Recently Added Patents
System and method of improving audio signals for the hearing impaired
Method of isolating human neuroepithelial precursor cells from human fetal tissue
Crowd control barrier II
Method of driving stereoscopic display apparatus and stereoscopic display apparatus
Method of treating lung cancer
Method and system for remote delivery of email
Integrated circuit packaging system with interconnects and method of manufacture thereof
  Randomly Featured Patents
DNA sequences from photorhabdus luminescens
Apparatus and method for cutting a web
Plastic frame system having a triangular support post
Materials and methods to inhibit Hodgkin and Reed Sternberg cell growth
DNA sequences useful for the synthesis of carotenoids
Automobile bumper
Personal robot
Modular optical spectrometer system
Switching network and switching network control for a switching node in a wideband transmission system
Blowout preventer protector and method of using same