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| US4073141 | 17 Mar 1977 | 14 Feb 1978 | Caterpillar Tractor Co. | Fluid control system with priority flow |
| US4165613 | 27 Mar 1978 | 28 Aug 1979 | Koehring Company | Control apparatus for a plurality of simultaneously actuatable fluid motors |
| US4218837 | 21 Aug 1978 | 26 Aug 1980 | Koehring Company | High lift hydraulic system for an excavator |
| US4365429 | 18 Nov 1981 | 28 Dec 1982 | Bucyrus-Erie Company | Maximum lift system for hydraulic hoe |
| US4489623 | 3 May 1982 | 25 Dec 1984 | Caterpillar Tractor Co. | Axle shaft and pump drive mechanism |
| US4598829 | 20 Jun 1985 | 8 Jul 1986 | FMC Corporation | Hydraulic circuit for crane |
| US4776751 | 19 Aug 1987 | 11 Oct 1988 | Deere & Company | Crowd control system for a loader |
| US4826474 | 14 Dec 1987 | 2 May 1989 | Butterworth Jetting Systems, Inc. | Forklift apparatus for unloading articles from an elevated surface |
| US5598648 | 9 Sep 1991 | 4 Feb 1997 | Kabushiki Kaisha Komatsu Seisakusho | Apparatus for controlling straight excavating operation with hydraulic excavator |
| US6450081 | 9 Aug 1999 | 17 Sep 2002 | Caterpillar Inc. | Hydraulic system for controlling an attachment to a work machine such as thumb attachment used on an excavator |
