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Class Information
Number: 135/30
Name: Tent, canopy, umbrella, or cane > Umbrella > Rib and stretcher joints > T-head and socket
Description: Devices comprising joints in which a slot or other opening in the runner or notch receives and retains a T-head mounted upon the inner end of the stretcher or rib, while permitting motion of the stretcher or rib along the length of the slot. Modifications of the meeting parts to form the joint are also included.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7178535 |
Umbrella with improved hub |
Feb. 20, 2007 |
| 6904923 |
Sunshade |
Jun. 14, 2005 |
| 6722382 |
Umbrella |
Apr. 20, 2004 |
| 6397866 |
For spring mechanism for large umbrella with automatic open feature |
Jun. 4, 2002 |
| 6336464 |
Stretcher structure used for collapsible two-layer canopy wind resistant umbrellas |
Jan. 8, 2002 |
| 5878763 |
Canopy supporting structure for a bi-section foldable umbrelia |
Mar. 9, 1999 |
| 5666986 |
Tent frame device |
Sep. 16, 1997 |
| 4750509 |
Folding device of a tent-framework |
Jun. 14, 1988 |
| 4576191 |
Umbrella frame |
Mar. 18, 1986 |
| 4368749 |
Wireless umbrella frame |
Jan. 18, 1983 |
| 4201237 |
Pivotal frame structure for collapsible umbrella type tent |
May. 6, 1980 |
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