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
Christopher R Roberts, Michael McMahon, Steven R Slawson: Body cavity irrigation system. Welch Allyn, Wall Marjama & Bilinski, November 26, 2002: US06485451 (48 worldwide citation)


A body cavity irrigation system includes a housing having at least one interior chamber which is connectable to a faucet or other continuous fluid supply which delivers liquid under pressure through an inlet port. A discharge port of the housing is fluidly interconnected to an irrigation syringe hav ...


3
William H Lagerway, Jeffrey Perkins, Steven R Slawson: Lamp assembly. Welch Allyn, Wall Marjama & Bilinski, June 30, 1998: US05774271 (23 worldwide citation)


A lamp assembly includes a condensing lens group disposed at one end for collecting and collimating a light from a light source, an exit lens group at the other end of the assembly, including at least one objective lens element for projecting an illuminated light spot at a predetermined distance, an ...


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
Robert L Vivenzio, Michael T McMahon, Steven R Slawson, Dominick Danna, Allan I Krauter, Dale C Saddlemire: Welch Allyn, March 27, 2012: US08142352 (10 worldwide citation)


A portable illuminator includes a contained power source and an integrally contained light source that is selectively inserted into the handle portion of a vaginal speculum. The portable illuminator includes at least one feature to protect the illuminator from contamination and to prevent users from ...


7
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 ...


8
Ervin Goldfain, Steven R Slawson, Eric M Andreassen, Cynthia A Kuiper, Elizabeth P Staples, Raymond A Lia: Otoscope. Welch Allyn, July 15, 2008: US07399275 (9 worldwide citation)


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


9
Michael T McMahon, Steven R Slawson, David C Woods, Andrew J Kugler: Acoustic measurement tip. Welch Allyn, Roger P Bonenfant, February 8, 2011: US07882928 (8 worldwide citation)


A tip for coupling sound between a medical instrument and an ear includes a sealing surface configured to substantially conform the tip to an auditory canal of the ear. The tip includes an acoustic tube acoustically coupled to at least one of the plurality of openings and defining a first acoustic p ...


10
Robert L Vivenzio, Raymond A Lia, Ian K Edwards, Thaddeus Wawro, Steven R Slawson: Medical diagnostic instrument having portable illuminator. Welch Allyn, March 5, 2013: US08388523 (6 worldwide citation)


A portable medical diagnostic instrument includes an instrument head and a handle portion having an open-ended receiving cavity. A compact illuminator defined by a housing retaining a miniature light source and a power supply is releasably fitted within the open-ended receiving cavity of the handle ...



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