With Drive Means For Tool Or Cleaner Patents (Class 172/35)
- Contiguous cooperating or intermeshing rotary ground engaging tools (Class 172/49)
- Diverse tools (Class 172/50)
- Tool reciprocates or oscillates within a generally horizontal plane (Class 172/54.5)
- Plural groups of disks (Class 172/55)
- Staggered tools (Class 172/56)
- Laterally spaced tools (Class 172/57)
- Non-driven furrow opener and driven dam former (Class 172/64)
- Interdigitating non-driven and driven tools (Class 172/65)
- Cooperating driven cleaner or comminutor and contiguous tool (Class 172/66)
- Driven comminutor at outlet of earth guide (Class 172/67)
- Rolling tool (Class 172/68)
- Fore-and-aft non-driven tool (Class 172/70)
- Non-driven tool follows path of driven tool (Class 172/71)
- Staggered driven and non-driven tool (e.g., cotton chopper, etc.) (Class 172/73)