| Patents for Joseph A. Sprague |
Patents 1 -
5
of 5
      |
| Number | Date | Patentee | Title | Type |
| D129,108 | Aug. 26, 1941 | J.A. Sprague | Camera Carrying Case | camera accessories |
| 2,353,896 | Jul. 18, 1944 | J.A. Sprague | Photographic Synchronizer Testing Equipmqnt | camera flash lighting apparatus |
| 2,353,897 | Jul. 18, 1944 | J.A. Sprague | Sensitized Material Holder or Carrier for Photographic Synchronizer Testing Equipment | camera flash lighting apparatus |
| 2,362,863 | Nov. 14, 1944 | B.D. Chamberlin, J.A. Sprague | Photoflash Synchronizer Device | camera flash lighting apparatus |
| 2,499,691 | Mar. 07, 1950 | J.A. Sprague | Selectively-Active Infinity Stop for Cameras | camera accessories |
