Quotables
"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 4037593 | Surgical mask with vapor barrier A surgical mask is provided with a vapor barrier for preventing clouding or fogging of optical aids or devices used by the wearer of the mask. The vapor barrier comprises a contoured strip of elongated soft closed cell foam material interposed between the... | 07/26/1977 |
| 3974829 | Means for preventing fogging of optical aids used by the wearer of a surgical mask A surgical mask is provided with means for preventing fogging of optical aids used by the wearer. The means comprises a strip of pliable material bonded to a layer of soft foam interposed between the upper edge of the mask and the wearer's face. An air im... | 08/17/1976 |
| 3969020 | Automatic refraction apparatus and method Apparatus and method provide for automatically measuring the refractive error of the human eye and thus the prescription for lens or eye glasses for correcting this error. Test symbols are alternately presented at two different locations on a test screen ... | 07/13/1976 |
