THOMAS THIEL JOHNSON
Architects in Milford, NH

5599302, Feb 4, 1997

Jan 9, 1995

8/369812

Stephen J. Lilley - Sawston, GB
Hugh F. Taylor - Sawston, GB
David R. Theobald - Huntingdon, GB
Craig J. Carlson - Andover MA
David I. Rosen - Arlington MA
Thomas R. Johnson - Milford NH

Medi-Ject Corporation - Minneapolis MN

A61M 530

604 68

A needleless injection system and method for injecting a medical product comprises a needleless injection device having a nozzle assembly defining an ampule chamber for holding medication, an energy device for pushing medication out of the nozzle assembly, and an energy device actuating mechanism. These components are operatively contained in a housing configured for a hand held operation. The energy device is a self-contained gas spring operatively connected to a plunger operating within the ampule chamber. The gas spring is preferably stepped which can be used in many different applications, an air gun being one. The injection device can be provide with a coupling device for coupling a medication supply vial to the nozzle assembly. The nozzle assembly is removably situated in the housing with the plunger removable therewith.

5891085, Apr 6, 1999

Jan 9, 1997

8/780917

Stephen John Lilley - Sawston, GB
Hugh Francis Taylor - Sawston, GB
David Reginald Theobald - Huntingdon, GB
Craig J. Carlson - Andover MA
David I. Rosen - Arlington MA
Thomas R. Johnson - Milford NH

Medi-Ject Corporation - Minneapolis MN

A61M 530

604 68

A needleless injection system and method for injecting a medical product including a needleless injection device having a nozzle assembly defining an ampule chamber for holding medication, an energy device for pushing medication out of the nozzle assembly, and an energy device actuating mechanism is disclosed. These components are operatively contained in a housing configured for hand held operation. The energy device is a self-contained gas spring operatively connected to a plunger operating within the ampule chamber. The gas spring is preferably stepped which can be used in many different applications, an air gun being one. The injection device can be provided with a coupling device for coupling a medication supply vial to the nozzle assembly. The nozzle assembly is removably situated in the housing with the plunger removable therewith.

5263962, Nov 23, 1993

Nov 19, 1991

7/794562

Thomas R. Johnson - Milford NH
Andrew L. Cote - Peterborough NH

Johnson Medical Development Corp. - Nashua NH

A61M 2902

606192

A balloon catheter is provided for treatment of hypertrophy of the prostate. The balloon is formed in a non-compliant transparent plastic sleeve fitted over a transparent plastic lumen. The distal end of the sleeve is secured to a fitting slidably mounted on the lumen.

6063099, May 16, 2000

Aug 12, 1998

9/132871

John K. Danks - Boca Raton FL
Richard V. Mazzola - Bloomfield NJ
Thomas R. Johnson - Milford NH

Endoscopic Concepts, Inc. - Del Ray Beach FL

A61B 1734

606185

A trocar is formed from a cannula and an interfitting obturator for penetrating body cavity walls in laparoscopic and endoscopic surgery. The obturator is provided with an improved piercing tip having a pointed blade and an improved double locking blunt nosed shield design. Hydrophilic coatings or components are also employed on the shield and cannula to facilitate quicker shield action covering the pointed blade and ease of entry of the cannula tube through the body cavity wall. The sharpened portion of the blade is substantially narrower than the inner diameter of the cannula tube and can be completely covered by the shield. The improved shielded trocar is provided with an improved shield design having a dolphin-nose shape at its distal end.

2011005, Mar 3, 2011

Aug 27, 2009

12/548974

Thomas R. Johnson - Milford NH, US
Yem Chin - Burlington MA, US
Paul M. Scopton - Winchester MA, US

THERAGENICS CORPORATION - Buford GA

A61M 25/00

604540

A drainage catheter includes a shaft having a flexible distal portion to be anchored in a cavity of a patient and a proximal portion attached to a hub. The hub includes a side port with a deformable sealing insert having self-sealing passageways for tensioning members, such as nylon filaments, passing through the catheter shaft and exiting the side port. The tensioning members are pulled proximally to deform and thereby anchor the distal portion of the catheter. Excess filament length is wrapped around a resilient pinch washer and held inside a groove in the pinch washer, with the groove thereafter compressed by a C-clip to secure the excess filament length inside the groove.

4995865, Feb 26, 1991

Jun 9, 1989

7/364799

William J. Gahara - Nashua NH
Thomas R. Johnson - Milford NH

Worldwide Medical Plastics Inc. - Nashua NH

A61M 500

604 43

Catheters having three lumens for injection and removal of fluids comprise an elongated tube having an integrally formed septum which extends throughout the length of the tube and defines the three lumens which may have the same or different cross-sectional areas. A smooth conical tapered tip is provided at the distal end of the tube and one of the lumens extends continuously through the tip to an opening at the apex of the tip. The other lumens extend continuously from the proximal end of the tube to openings in their sidewalls at a location axially spaced from the tip at the distal end. These catheters permit higher rates of fluid transfer in dialysis and like procedures than do double lumen catheters and are less prone to occlusion.

5989228, Nov 23, 1999

Aug 13, 1996

8/695476

John K. Danks - Delray Beach FL
Thomas R. Johnson - Milford NH

Endoscopic Concepts, Inc.

A61M 500

604256

A trocar is formed from a cannula and an interfitting obturator for penetrating body cavity walls in laparoscopic and endoscopic surgery. The cannula has an improved inexpensive flexible flapper valve and can be manufactured with a reusable cannula tube but disposable flapper valve assembly to minimize cost.

5125903, Jun 30, 1992

Aug 1, 1991

7/739072

Brian E. McLaughlin - Salem MA
Thomas R. Johnson - Milford NH

Medtronic, Inc. - Minneapolis MN

A61M 5178

604167

A self-sealing, penetrable, hemostasis valve for a catheter introducer or the like which comprises an elastomeric gasket member having first and second opposed faces adapted to be secured in a valve housing, wherein faces define generally concave surfaces to reduce the central thickness of the gasket member, and a pin hole or slits extending through the first and second opposed faces generally at or through the central region of the gasket member. The generally concave opposed face surfaces are molded to possess a pair of convex cusp-shaped surfaces, each lying in about one-half of the generally concave surfaces, each convex cusp having an edge thereof passing generally through the central region of reduced thickness. The pair of generally convex, cusp-shaped surfaces on the first face is disposed at a 90 degree angle to the pair of generally convex, cusp-shaped surfaces on the second face. Preferably short intersecting slits extend through the reduced thickness central region oriented at a 45 degree angle to the 90 degree lines of intersection of the mating edges of the first and second cusp-shaped surfaces on each face of the elastomeric gasket member.

5304147, Apr 19, 1994

Nov 6, 1992

7/972612

Thomas R. Johnson - Milford NH
Andrew L. Cote - Peterborough NH

Johnson Medical Development Corp. - Milford NH

A61M 5178, A61M 5315

604183

An injection syringe useful in the medical arts for injecting high viscosity fluids or pastes, particularly in endoscopic applications. The syringe includes a force multiplying mechanism to infuse viscous medicaments such as collagen or polytetrafluoroethylene paste, with a controlled metering action. The force multiplying mechanism is provided by the combination of lower piston cylinder chamber that intersects with an upper cylinder chamber, wherein the piston is connected to a piston advancing means on a lever pivot arm.

5545150, Aug 13, 1996

May 6, 1994

8/238959

John K. Danks - Boca Raton FL
Richard V. Mazzola - Bloomfield NJ
Thomas R. Johnson - Milford NH

Endoscopic Concepts, Inc. - Delray Beach FL

A61M 500, A61M 514

604256

A trocar is formed from a cannula and an interfitting obturator for penetrating body cavity walls in laparoscopic and endoscopic surgery. The obturator is provided with an improved piercing tip having a pointed blade and an improved double locking blunt nosed shield design. Hydrophilic coatings or components are also employed on the shield and cannula to facilitate quicker shield action covering the pointed blade and ease of entry of the cannula tube through the body cavity wall. The cannula also has an improved inexpensive flexible flapper valve and can be manufactured with a reusable cannula tube but disposable flapper valve assembly to minimize cost.