Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Revolving Door Control, Inc. Patents
Assignee:
Revolving Door Control, Inc.
Address:
Claremont, CA
No. of patents:
1
Patents:












Patent Number Title Of Patent Date Issued
5012455 Security door with improved sensor for detecting unauthorized passage April 30, 1991
A control system for a revolving door includes an ultrasonic sensor having multiple sensor heads. The door has a housing, and multiple moveable compartments formed by door wings attached to and radially extending from a rotatable axis. The sensors emit energy waves into the housing in

 
 
  Recently Added Patents
Scoring records for sorting by user-specific weights based on relative importance
SONOS stack with split nitride memory layer
Device for data routing in networks
Apparatus and method for controlling semiconductor die warpage
Laser protection polymeric materials
Proximity search methods using tiles to represent geographical zones
Method and system for generating and displaying an interactive dynamic graph view of multiply connected objects
  Randomly Featured Patents
Filter circuit and radio communication system comprising filter
Bale-sheathing device
Vibratory string for musical instrument
Monitoring polyethylene polymerization system utilizing the method for message suppression in rule based expert system
Optical waveguide terminating apparatus
Jitter-form background control for minimizing spurious gray cast in scanned images
Method and system for load balancing traffic in a wireless network
Adjustment fitting for use in a motor vehicle component
Disc player
Chroman derivatives