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| Number | Title | Issue Date |
| 7192216 | Height adjustable screed and method A height adjustable paving stone screed for use in an area bounded by a course of paving stones includes an elongated board. A pair of right angle brackets are mounted on top of the board. Slidably attachable to each right angle brackets include a pair of further ri... | 03/20/2007 |
| 4028822 | Manually operable depth control for trenchers The invention relates to a mechanism permitting the manual control of an trencher which is normally carried in trailing relationship to a vehicle and is pivotally mounted to the vehicle. The effective cutting depth of this type trencher is determined by t... | 06/14/1977 |
