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Class Information
Number: 182/219
Name: Fire escape, ladder, or scaffold > Ladder > With reinforcing means > For side rail
Description: Device in which the side rails are reinforced.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6032759 |
Ladder with anti-deformed side rails |
Mar. 7, 2000 |
| 5791439 |
Ladder, member for connecting a rail to a horizontal element of a ladder, and method, and apparatus and method for holding a washer |
Aug. 11, 1998 |
| 5131495 |
Hollow plastic ladder |
Jul. 21, 1992 |
| 4998982 |
Metal ladder construction with reinforced side rails |
Mar. 12, 1991 |
| 4917216 |
Segmented ladder construction |
Apr. 17, 1990 |
| 4905793 |
Ladder bracket |
Mar. 6, 1990 |
| 4884659 |
Collapsible ladder |
Dec. 5, 1989 |
| 4852690 |
Aerial ladder tower with pretensioned truss members |
Aug. 1, 1989 |
| 4333547 |
Climbing device for vehicles |
Jun. 8, 1982 |
| 4261436 |
Metal ladder and method of fabricating the same |
Apr. 14, 1981 |
| 4230202 |
Roofing aid |
Oct. 28, 1980 |
| 4223507 |
Composite aluminum jack poles |
Sep. 23, 1980 |
| 4219102 |
Metallic ladders |
Aug. 26, 1980 |
| 4135508 |
Stairway stringers |
Jan. 23, 1979 |
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