| Number | Name | Date | Kind |
|---|---|---|---|
| 4025786 | Hamilton | May 1977 | |
| 4063963 | Bond, Jr. | Dec 1977 |
| Entry |
|---|
| P. S. Masser et al., "Fixed Angle & Seasonably Adjustable Structural Support Concepts For Solar Converters", Conf. Record, 13th IEEE Photovoltaic Specialists Conf., (1978), pp. 1084-1089. |