| Number | Name | Date | Kind |
|---|---|---|---|
| D348340 | Collins et al. | Jun 1994 | |
| 4095250 | Giglioli | Jun 1978 | |
| 4597498 | Spinosa | Jul 1986 | |
| 4899097 | Chapman | Feb 1990 | |
| 4907768 | Masseron | Mar 1990 | |
| 5312121 | Chapman | May 1994 | |
| 5318313 | Chapman | Jun 1994 |
| Entry |
|---|
| The HY HY Crane Arm Base brochure, Leonard Studio Equipment, Inc. (1993). |