| Patents for G04B 49 - Time-pieces using the position of the sun, moon, or stars (206) | |
|---|---|
| 08/1978 | |
| 08/01/1978 | US4103429 Sun and star time dial |
| 07/1978 | |
| 07/25/1978 | US4102054 Sundial |
| 04/1978 | |
| 04/04/1978 | US4081911 Sundial |
| 09/1977 | |
| 09/27/1977 | US4050161 True north meridian indicator |
| 06/1977 | |
| 06/14/1977 | US4028813 Sun compass |
| 03/1976 | |
| 03/02/1976 | US3940859 Unitary space transit |