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"The Americans have need of the telephone, but we do not. We have plenty of messenger boys."
Sir William Preece, chief engineer, British Post Office ; 1878
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| Number | Title | Issue Date |
| 5241971 | Ear-protection cup for ear muffs or head-phones An ear-protection cup for ear muffs or headphones comprising a cup-shaped frame and a resilient sealing member located at the peripheral edge thereof, by means of which the ear-protection cup can be brought into abutment with an annular shaped part of a u... | 09/07/1993 |
| 5239703 | Positionable visor arrangement The visor arrangement of the present invention includes a visor element and support apparatus to support the element in a pivotable state between a lowered, operative position and a raised, inoperative position on a protective helmet or other holder which... | 08/31/1993 |
