Adjustable Patents (Class 248/274.1)
- Lazy tong type (Class 248/277.1)
- Vertical pivot at right angle to horizontal pivot (Class 248/278.1)
- Vertical pivots (Class 248/282.1)
- Horizontal pivots (Class 248/284.1)
- Single vertical pivot and sliding joints (Class 248/285.1)
- Single horizontal pivot and sliding joints (Class 248/286.1)
- Horizontally and vertically sliding joints (Class 248/287.1)