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Inventor

Ronald J. Zdrojkowski

Inventor
Pittsburgh, PA, US

Overview

17→
Patents
1977–2006
Patent span
Human necessities
Primary field (CPC A)

Patents· 17 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

A61Mprimary
A61MDevices for introducing media into, or onto, the body54%
A61BDiagnosis11%
A62BDevices, apparatus or methods for life-saving11%
G05DSystems for controlling or regulating non-electric variables7%
A61FFilters implantable into blood vessels4%
G11BInformation storage based on relative movement between record carrier and transducer4%
H03GControl of amplification4%
H03KPulse technique4%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%
PatentTitleYear
7,100,607'Breathing gas delivery method and apparatus'20066,948,497'Breathing gas delivery method and apparatus'20056,539,940'Breathing gas delivery method and apparatus'20036,305,374'Breathing gas delivery method and apparatus'20016,029,664'Breathing gas delivery method and apparatus'20005,937,855'Flow regulating valve in a breathing gas delivery system'19995,878,743'Pressure sensitive flow control valve'19995,803,065'Breathing gas delivery method and apparatus'19985,685,296'Flow regulating valve and method'19975,632,269'Breathing gas delivery method and apparatus'19975,433,193'Breathing gas delivery method and apparatus'19955,313,937'Leak compensation method and apparatus for a breathing system'19945,148,802'Method and apparatus for maintaining airway patency to treat sleep apnea and other disorders'19924,369,785'Surgical fluid flow system'19834,122,843'Electrode system for a heart rate monitor'19784,087,840'Method and apparatus for magnetically recording and reproducing physiological information'19784,006,736'Angiographic injector'1977

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1977Patents assigned to MEDRAD INC (1)· patent assignee history
1977–2005Based in Pittsburgh, PA, US· patent location history
1978Patents assigned to ELECTRO TECHNICS INC (1)· patent assignee history
1983Patents assigned to CONTEMPORARY OCU FLO INC (1)· patent assignee history
1992–2003Patents assigned to RESPIRONICS INC (11)· patent assignee history
2005–2006Patents assigned to RIC INVESTMENTS INC (2)· patent assignee history
2006Based in Murrysville, PA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
RESPIRONICS INC111992–2003
RIC INVESTMENTS INC22005–2006
CONTEMPORARY OCU FLO INC11983
ELECTRO TECHNICS INC11978
MEDRAD INC11977
Locations
LocationPatentsSpan
Pittsburgh, Pennsylvania, US161977–2005
Murrysville, Pennsylvania, US12006