| Otto frederick rohwedder biography | |
| Ted maiman | Theodore Harold Maiman (J – May 5, ) was an American engineer and physicist who is widely credited with the invention of the laser. |
| Otto Frederick Rohwedder (J – November 8, ) was an American inventor and engineer who created the first automatic bread-slicing machine for commercial use. | |
| Otto Rohwedder of Davenport, Iowa, created the invention by which all others are judged — sliced bread — in His innovation quickly changed consumer culture. |
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