1
Steven R Slawson, Ronald A Hauptli, Chris R Roberts, Allan I Krauter, Ervin Goldfain: Focusing mechanism. Welch Allyn, Wall Marjama & Bilinsk, May 21, 2002: US06390625 (142 worldwide citation)


A focusing mechanism for an optical instrument includes an eyepiece having at least one lens element retained within an eyepiece housing, a stationary carrier for retaining the eyepiece, and a rotatable thumb wheel. A pair of levers operatively connect the eyepiece housing with the rotatable thumb w ...


2
Chris R Roberts, Corinn C Fahrenkrug, Allan I Krauter, Shawn A Briggman, Michael A Pasik, Peter J Davis, John R Strom, Charles N Stewart, Jon R Salvati, Robert L Vivenzio: Electrical adapter for medical diagnostic instruments using LEDs as illumination sources. Welch Allyn, Marjama & Bilinski, October 2, 2007: US07276025 (78 worldwide citation)


An adapter for permitting a medical diagnostic instrument having an illumination source including at least one LED (light emitting diode) to be used with a power supply normally configured for use with a diagnostic instrument having at least one incandescent lamp as an illumination source. The adapt ...


3
Chris R Roberts, Allan I Krauter, Michael A Pasik, John R Strom, Peter J Davis: Medical diagnostic instrument. Welch Allyn, Peter J Bilinski, April 18, 2006: US07029439 (36 worldwide citation)


A medical diagnostic instrument includes a housing containing at least one battery and a light source, such as a lamp, for illuminating a medical target. A switch includes a movable member that selectively moves at least one of the battery and the lamp into and out of electrical connection with the ...


4
Ervin Goldfain, William Lagerway, Chris R Roberts, Steven R Slawson, Allan I Krauter: Eye viewing device for retinal viewing through undilated pupil. Hand Held Products, Wall Marjama & Bilinski, June 25, 2002: US06409341 (15 worldwide citation)


The invention is a low cost, low input power eye viewing device well suited for viewing wide field retinal images through an undilated pupil. Included in the device are a converging light illumination system and an aperture stop. The converging light illumination system provides ease of entry of lig ...


5
Ervin Goldfain, Chris R Roberts, Allan I Krauter, Steven R Slawson, William H Lagerway: Eye viewing device for retinal viewing through undilated pupil. Welch Allyn, George S Blasiak, Wall Marjama & Bilinski, October 28, 2003: US06637882 (11 worldwide citation)


The invention is a low cost, low input power eye viewing device well suited for viewing wide field retinal images through an undilated pupil. Included in the device are a converging light illumination system and an aperture stop. The converging light illumination system provides ease of entry of lig ...


6
John R Strom, Cynthia A Kuiper, Chris R Roberts, Michael E Bausch, Allan I Krauter, Eric M Andreassen, David C Woods: Otoscopic tip element and related method of use. Welch Allyn, April 8, 2008: US07354399 (10 worldwide citation)


A tip element for an otoscopic apparatus includes engagement features that permit selective attachment to two different tip attachment mechanisms. The tip element includes both interior and exterior engagement features that provide interchangeability with otoscopes having different tip attachment sc ...


7
Chris R Roberts, Corinn C Fahrenkrug, Allan I Krauter, Shawn A Briggman, Michael A Pasik, Peter J Davis, John R Strom, Charles N Stewart, Jon R Salvati, Robert L Vivenzio: Electrical adapter for medical diagnostic instruments using replaceable LEDs as illumination sources. Welch Allyn, Hiscock & Barclay, December 2, 2008: US07458934 (10 worldwide citation)


An LED for use with a medical diagnostic instrument having an adapter disposed between an instrument head and a hand-grippable handle, the LED being removably attachable in relation to the adapter in order to permit selective replacement of the LED, as needed. The LED is situated in order to provide ...


8
Ervin Goldfain, William Lagerway, Chris R Roberts, Steven R Slawson, Allan I Krauter: Ophthalmoscope comprising defocused light source. Wall Marjama Bilinski & Burr, May 23, 2000: US06065837 (10 worldwide citation)


The invention is an ophthalmoscope having an imaging path and imaging axis which includes a light source disposed in the imaging path at or in proximity with the imaging axis. Disposing the light source directly in the imaging path at or in proximity with the imaging axis provides numerous illuminat ...


9
Ervin Goldfain, William Lagerway, Chris R Roberts, Steven R Slawson, Allan I Krauter: Eye viewing device for large field viewing. Welch Allyn, Wall Marjama & Bilinski, September 6, 2005: US06939006 (5 worldwide citation)


The invention is a low cost, low input power eye viewing device well suited for viewing wide field retinal images through an undilated pupil. Included in the device are a converging light illumination system and an aperture stop. The converging light illumination system provides ease of entry of lig ...


10
Steven R Slawson, Chris R Roberts, Allan I Krauter, Ervin Goldfain: Eye viewing device comprising eye cup. Welch Allyn, Wall Marjama & Bilinski, December 14, 2004: US06830347 (5 worldwide citation)


The invention is a hand-held eye viewing device adapted to be readily positioned in an operative radial displacement, angular orientation and axial standoff position relative to an eye. The eye viewing device includes an eye cup extending from a patient end of the device having a patient end adapted ...



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