1
David G Perkins, Jon R Salvati, William M Wrisley, Ronald A Hauptli, Stephen C Wilson, Russ J Kalil, Richard A Monroe: Compact imaging instrument system. Welch Allyn, Wall Marjama Billinski & Burr, August 22, 2000: US06106457 (146 worldwide citation)


An imaging instrument includes a compact hand-held housing having an electronic imaging element supported within a housing, and a plurality of interchangeable instrument heads separably attachable to the housing. Each of the instrument heads includes an optical system disposed in alignment with the ...


2
Corinn C Fahrenkrug, Ervin Goldfain, Andrew J Kugler, David G Perkins, Howard A Haines III, William N Cuipylo: Compact ocular measuring system. Welch Allyn, Wall Marjama Bilinski & Burr, December 28, 1999: US06007204 (61 worldwide citation)


Apparatus for determining refractive aberrations of the eye of a patient includes an instrument housing having a light source for projecting a substantially focused beam of light at the back of the eye of a patient, said substantially focused beam acting as a secondary source for a return light path ...


3
Jon R Salvati, David G Perkins, Stephen C Wilson: Compact imaging instrument system. Welch Allyn, Wall Marjama & Bilinsk, May 21, 2002: US06393431 (57 worldwide citation)


An imaging instrument includes a compact hand-held housing having an electronic imaging element supported within a housing, and a plurality of interchangeable instrument heads separably attachable to the housing. Each of the instrument heads includes an optical system disposed in alignment with the ...


4
William H Lagerway, David G Perkins, William M Wrisley, Ronald A Hauptli: Objective lens system for imaging instrument. Welch Allyn, Wall Marjama & Bilinski, November 7, 2000: US06142934 (41 worldwide citation)


A retrofocus objective lens system which is conducive for an otoscope includes a first group of optical elements positioned at a distal portion and a second group of optical elements proximally spaced from the first group of optical elements. The first group of optical elements includes at least one ...


5
David G Perkins, Douglas J Linquest, Thaddeus J Wawro, Kristin A Metz, Peter H Soderberg, Bonita L Labosky, Robert L Vivenzio: Mobile medical workstation. Welch Allyn, October 23, 2012: US08292807 (38 worldwide citation)


A medical workstation is defined by a supporting structure having at least one medical diagnostic instrument disposed thereupon. A first display is further disposed on a first side of the supporting structure and a second display is disposed on a second side of the supporting structure in a manner s ...


6
Mary A Collins, David G Perkins, Harry E White: Sealing member and methods of sealing. Raychem Corporation, Herbert G Burkard, Sheri M Novack, December 31, 1996: US05588856 (31 worldwide citation)


An open end of a hollow member is sealed using a sealing member comprising a layer of sealant between two constraining layers. Force is applied to the sealing member to maintain the sealant in sealing contact with the inner walls of the hollow member. At least one of the constraining layers and/or t ...


7
Richard A Monroe, David G Perkins, Robert J Wood: Video otoscope. Welch Allyn, Wall Marjama Bilinski & Burr, July 6, 1999: US05919130 (31 worldwide citation)


A video otoscope includes an elongated body portion having a conically shaped insertion portion sized for insertion a predetermined distance into an ear canal. The insertion portion includes a tip opening and an interior having a lens system for focusing an optical image of a target onto a distally ...


8
David G Perkins: Measuring adapter for viewing instrument. Welch Allyn, Wall Marjama Bilinski & Burr, January 4, 2000: US06010450 (11 worldwide citation)


A measuring adapter allows a viewing instrument, such as an otoscope or other imaging device, to perform surface examinations without significant modification thereto. The adapter is releasably attachable to the instrument housing and includes a distal optical element retained by an adapter housing ...


9
David G Perkins: Fixation card attachment for retinoscope. Welch Allyn, Wall and Roehrig, April 13, 1993: US05202710 (10 worldwide citation)


A fixation card attachment for an eye examination instrument that enables the card to be positioned in reference to the optical path of the instrument so that the patient undergoing examination must refocus his or her eye when reading indicia on the card. The card is secured to the instrument by use ...


10
David G Perkins: Retinoscope with external control sleeve. Welch Allyn, Wall and Roehrig, February 23, 1993: US05189449 (8 worldwide citation)


A streak retinoscope has an external control sleeve that is fully rotatable and is movable axially for rotating the lamp and focusing the lens assembly, respectively. The lens assembly is carried on the lens holder and the lamp assembly is carried on a lamp carrier. The lamp carrier is rotatable but ...



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