| Number | Name | Date | Kind |
|---|---|---|---|
| D310619 | Schade | Sep 1990 | |
| D329785 | Colonello | Sep 1992 | |
| D373056 | Hueber | Aug 1996 | |
| 4741150 | Saksun | May 1988 |
| Entry |
|---|
| "1997 Catalog of Golf Course Accessories", Stanford Golf Company, .COPYRGT.1996, Rakes, pp. 18, 19 & 38. |
| "Golf Course Accessories", LESCO, Inc., (1995), Rakes pp. 14-15. |