Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Door security system










Image Number 4 for United States Patent #4763499.

A door security system for the protection of a lock as well as a set of hinges both associated with a door wherein the security system includes a wrap-around cover plate covering surface portions of the exterior and interior of the door adjacent the lock and the lock side surface around the bolt plate of the lock. In addition, structures designed to protect each of the plurality of hinges serving to hang the door on the hinge jamb thereof include a wrap-around cover plate and hinge pin fittings on the inside of the door and a jamb plate and a vertical bar attached to an exterior section which includes a bar surface that is adjacent to a vertically extensive, exterior surface end region of the hinge cover plate when the door is closed.








 
 
  Recently Added Patents
Commissioning incoming packet switched connections
System for controlled release of an active principle and method for preparation
System and method for backup communication over ethernet
Biological information monitoring system
Processing circuitry for use with a position sensor
Communication system, authentication device, control server, communication method, and program
Emergency whistle, flashlight, and compass
  Randomly Featured Patents
Preparation of concentrated polyacrylate dispersions
Copolymers of substituted piperidines, their manufacture and use
Composite electrodes for diaphragmless electrolytic cells for the production of chlorates and hypochlorites II
Measurement of wavelength transients in tunable lasers
Electrical connector and method of manufacture
Intrapalmar orthosis
Wireless communications systems with self threshold setting
Control operation system for elevator with flood speed detector and controller
Damping vibrations in sheet material
Method for the determination of a time, location, and quantity of goods to be made available based on mapped population activity