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In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 4490857 | Band earplug An ear noise protector apparatus is described, which provides a high level of noise protection, can be worn comfortably, and is economical to use. The apparatus includes a resilient head band with ear protector holders at either end, and a pair of ear pro... | 01/01/1985 |
| 4449255 | Eyepiece for protective devices A unitary transparent eyepiece has a planar outer rim and a planar inner viewing zone, the plane of the inner viewing zone being inclined at an angle to the plane of the outer rim. The angle between the, preferably circular, inner viewing zone and the, pr... | 05/22/1984 |
| 4353134 | Underwater swimming goggles and masks with gravity-operated wipers The invention is concerned with an improved underwater swimming mask or goggles having a lens with an inner surface, a frame mounting the lens in spaced relationship to a swimmer's eyes and a water-excluding face-fitting skirt peripherally extending from ... | 10/12/1982 |
| 4279039 | Swim cap with integral eye protection An elastic swimmer's cap according to the instant invention includes integral eye protection. The eye protection comprises transparent or translucent lenses which are secured to the cap. Preferably, for reasons of improved comfort and water-tight seal, a ... | 07/21/1981 |
| 4279040 | Diving mask A diving mask comprising an eyeglass mounting frame; an outer frame made in two pieces which can be connected together by means of coupling members; and a rubber face piece provided with a front aperture, the peripheral rim of which overlaps the outer rim... | 07/21/1981 |
| 4264987 | Goggles The goggles have two eyepieces connected by an elastomeric strap forming a nosepiece, the length of which is adjustable by loosening a pair of adjustment screws. Each eyepiece has an upper contour portion having a smooth incurve to conform to the upper ey... | 05/05/1981 |
| 4185329 | Welder's shield for electric arc welding An improved welder's shield for electric arc welding comprising a flexible gasket secured to and protruding from the inside surface of the face mask. The gasket circumscribes the viewing window of the mask and flushly meets the face of the wearer about hi... | 01/29/1980 |
| 4171543 | Mask for skin-diving An improved diving mask includes a rubber body configured to mate with the user's face, a viewing lens having a mounting frame extending about and secured to its rim and a fairing body which substantially encompasses the rubber body and is configured for ... | 10/23/1979 |
| 4112521 | Quick adjust strap for diver's face mask A quick adjust strap for ready connection and release of a diver's face mask. A headband is connected to brackets on the sides of the face mask. One end of the headband is received in a ring of one bracket and nipples thereon lock with a slider member the... | 09/12/1978 |
| 4087865 | Diving mask A diving mask comprises a rigid front sight piece, transparent at least for its major portion and a flexible anatomically shaped body, which is molded in a suitable mold inside which the front piece has been arranged previously. The front piece is provide... | 05/09/1978 |
| 4077068 | Underwater diving mask The diving mask incorporates a clamp operated from the outside for squeezing the diver's nostrils together so that he can then "clear his ears," which is the act of allowing, or gently forcing, air through the restriction of the eustachian tubes to equali... | 03/07/1978 |
| 4069516 | Breathing face mask A resiliently flexible sealing element conformable to the face of a wearer is supported by and spaced from a mask body by a resiliently flexible web, the sealing element and web extending perimetrically around the open side of the mask body and the hinge ... | 01/24/1978 |
