| All Patents in class 73/1.56 |
Patents 1 -
4
of 4
      |
| Number | Date | Patentee | Title | Type |
| 2,271,340 | Jan. 27, 1942 | I. Jacobson | Shutter and Flash Synchronizer for Cameras | camera flash lighting apparatus |
| 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 |
| 5,610,327 | Mar. 11, 1997 | M.M. Crass, M.A. Hoferitza, T.P. Becker | Knock Sensor-Triggered Timing Light with Visible Laser Retro-Reflecting Control | |
