"Radio has no future."
Lord Kelvin, British mathematician and physicist ; 1897
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| Number | Title | Issue Date |
| 5732846 | Hollow body with watertight closure Hollow body made of metal or plastic with at least two axial chambers with a separation wall therebetween and with a watertight closure including a cap provided with filling and venting openings this cap having stoppers positively insertable in each chamb... | 03/31/1998 |