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Class Information
Number: 52/720.3
Name: Static structures (e.g., buildings) > Shaft (i.e., elongated rigid structure) > Security bar
Description: Subject matter wherein the shaft"s structure is configured to prohibit entry or egress (e.g., to a jail cell, vault, etc.).
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6446411 |
Reinforced pole with apparatus and method for anchoring |
Sep. 10, 2002 |
| 6385916 |
Hurricane reinforcement device |
May. 14, 2002 |
| 6282861 |
Reinforced pole with apparatus and method for anchoring |
Sep. 4, 2001 |
| 6276103 |
Cover panel brace for partition systems |
Aug. 21, 2001 |
| 5701714 |
Wrought iron grating assembly |
Dec. 30, 1997 |
| 5600931 |
Structural beam for supporting and reinforcing a structure |
Feb. 11, 1997 |
| 4669239 |
Security bars and barrier grids incorporating same |
Jun. 2, 1987 |
| 4598508 |
Device for securing building shafts against forcible entry or passage |
Jul. 8, 1986 |
| 4441299 |
Metallic security bar system for window and patio doors |
Apr. 10, 1984 |
| 4395861 |
Security grid for lighting shafts and the like |
Aug. 2, 1983 |
| 4077167 |
Security window unit |
Mar. 7, 1978 |
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