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| Number | Title | Issue Date |
| 5500953 | Double lens electric shield Known protective helmets used for motorcycle riding, flying and snowmobiling employ transparent visors that have heating elements to reduce and attempt to eliminate the build-up of ice, condensation and fog. A double-lensed face shield is provided with a ... | 03/26/1996 |
| 5351339 | Double lens electric shield Known protective helmets used for motorcycle riding, flying and snowmobiling employ transparent visors that have heating elements to reduce and attempt to eliminate the build-up of ice, condensation and fog. A double-lensed face shield is provided with a ... | 10/04/1994 |
