Number | Name | Date | Kind |
---|---|---|---|
D194504 | Landell et al. | Feb 1963 | |
4281993 | Shaw | Aug 1981 | |
4299393 | Benckert et al. | Nov 1981 | |
4315689 | Goda | Feb 1982 |
Entry |
---|
The Optical Industry & Systems Directory, 1978, p. 154, High Power Laser System, Model 312A Spatial Filter. |