21
Ervin Goldfain, Steven R Slawson, Eric M Andreassen, Kimberly E McNeilly, Elizabeth P Staples: Veterinary otoscope. Welch Allyn, September 28, 2010: US07803110 (3 worldwide citation)

A veterinary otoscope permitting examination of an ear is defined by an instrument head including a proximal end and a distal insertion portion that is insertable into the ear. The veterinary otoscope includes an imaging lens train disposed within the instrument head, wherein each of the imagine len ...


22
William E Cleveland, Ervin Goldfain: Compact telescoping retinoscope. Welch Allyn, Harris Beach & Wilcox, October 17, 1995: US05459535 (3 worldwide citation)

The present invention is directed to a compact retinoscope which telescopes to a closed position in order to allow the instrument to be stored in a pocket or pocket carrying case. As the instrument body or head is pushed downward to its closed position, a main internal sleeve travels upwards (relati ...


23
Eric M Andreassen, David M Fallat, Ervin Goldfain, John R Strom, John T Delaney, Howard Haines III, Corinn C Fahrenkrug, Cynthia A Kuiper: Digital otoscope. Welch Allyn, Hiscock & Barclay, June 25, 2013: US08469882 (2 worldwide citation)

An otoscope includes an instrument head, a tip element and an optical system. The instrument head has a distal insertion portion for insertion into an ear of a human or veterinary subject. The distal insertion portion has a distal opening. The tip element is releasably attached to the distal inserti ...


24
Raymond A Lia, Chris R Roberts, Ervin Goldfain, Steven R Slawson, Robert J Wood: Replacement light assembly. Welch Allyn, Lee & Hayes PLLC, May 2, 2017: US09636004 (1 worldwide citation)

A light assembly for a hand-held medical diagnostic instrument. The light assembly includes a substrate having a top surface and a bottom surface, a light source mounted to the top surface, and the bottom surface having first and second electrical terminals. The light assembly further includes a cir ...


25
Raymond A Lia, Ervin Goldfain, Chris R Roberts, Steven R Slawson, Robert J Wood: Replacement light assembly. WELCH ALLYN, December 1, 2015: US09198566 (1 worldwide citation)

A light assembly for a hand-held medical diagnostic instrument. The light assembly includes a substrate having a top surface and a bottom surface, a light source mounted to the top surface, and the bottom surface having first and second electrical terminals. The light assembly further includes a cir ...


26
Ervin Goldfain: Method and apparatus for observing subsurfaces of a target material. Welch Allyn, Guntin & Gust, Ed Guntin, April 7, 2015: US09001326 (1 worldwide citation)

A system that incorporates teachings of the present disclosure may include, for example, a method for generating from a light source a light signal operating in a region of the light spectrum, modifying the light signal with a first polarization device having a first polarization state to generate a ...


27
Ynjiun Paul Wang, Ervin Goldfain, Eric G Petersen: Ophthalmoscope device. Welch Allyn, Merchant & Gould P C, January 19, 2016: US09237847 (1 worldwide citation)

An ophthalmoscope device includes a support structure, an image capture device, and a display device. The support structure is configured to be worn by a subject. The image capture device is configured to capture images of the eye fundus of the subject. The display device is configured to overlay im ...


28
Ervin Goldfain, Chris R Roberts, Allan I Krauter, Steven R Slawson, William H Lagerway: Eye viewing device comprising video capture optics. Welch Allyn, December 25, 2012: US08337017 (1 worldwide citation)

There is described in one embodiment an eye viewing device for viewing a structure of an eye such as a retina. The eye viewing device can include an image sensor. In one embodiment an eye viewing device can be adapted to facilitate both visual viewing of an eye structure and electronic image capture ...


29
Ervin Goldfain, Raymond A Lia: Method and apparatus for analyzing subsurfaces of a target material. Welch Allyn, Guntin & Gust, Ed Guntin, April 21, 2015: US09014792 (1 worldwide citation)

A system that incorporates teachings of the present disclosure may include, for example, a method for aligning first and second light signals on an optical path directed to a target, where the first light signal provides a visualization of the target, and a portion of the second light signal reflect ...


30
Raymond A Lia, Robert L Vivenzio, John R Strom, Ervin Goldfain: Medical instrument having LED illumination system. Welch Allyn, Barclay Damon, November 14, 2017: US09814377 (1 worldwide citation)

A medical diagnostic instrument includes a housing having an interior, a distal end and an opposing proximal end. A supporting member is disposed within the interior of the housing, and supports a plurality of LEDs. A light guide made from a light transmissive material is distally disposed in relati ...



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