Patent · US Expired

Method and apparatus for controlling the passage of persons and objects between two areas

US4006459A · kind A · utility

16Cited by
2References
8Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMay 25, 1973
Grant dateFeb 1, 1977
Priority date—
Expiry dateMay 25, 1993

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG07C9/253
  • WIPO fieldControl
  • WIPO sectorInstruments

Abstract

A security method for controlling the passage of persons and objects between two areas, this method employs a controlled space. Prior to admitting, during the presence and subsequent to exiting of a person to this space, the contents of the space are monitored and examined.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.