Did You Know...
...that after Walter Hunt patented the safety pin in 1849, he sold the rights to it for $400?
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| Number | Title | Issue Date |
| 5040478 | Bendable marker with signage protection feature A marker supported in the ground allows a reel-type grass mower to cut grass around the marker without requiring the removal of the marker. The marker has a flexible elastomeric element coupled between a substantially rigid shaft and a substantially rigid... | 08/20/1991 |
| 4903465 | Mower guard for flexible markers A mower has features that allow it to mow directly over a flexible marker shaft without damage to the shaft. The mower has front and rear rollers mounted directly in front and behind each blade. These rollers engage the ground in rolling contact and suppo... | 02/27/1990 |
| 4862823 | Bendable marker and method of marking A marker supported in the ground allows a reel-type grass mower to cut grass around the marker without requiring the removal of the marker. The marker has a flexible elastomeric element coupled between a substantially rigid shaft and a substantially rigid... | 09/05/1989 |
