MARC DANIEL LIANG
Medical Practice in Pittsburgh, PA

6200326, Mar 13, 2001

Apr 28, 1999

9/301093

Krishna Narayanan - Pittsburgh PA
Marc D. Liang - Pittsburgh PA

A61B 1750

606133

A new method and apparatus for the long-term removal of hair are provided. Ultrasonic energy is transmitted to a needle passed through the skin into an individual hair follicle. The resulting cavitation of the area surrounding the hair follicle causes the hair follicle to be disrupted. The process is repeated for individual hair follicles over the selected region of the body.

5501680, Mar 26, 1996

Jan 15, 1992

7/821404

John L. Kurtz - Indiana PA
Marc D. Liang - Pittsburgh PA
Krishna Narayanan - Pittsburgh PA

The University of Pittsburgh - Pittsburgh PA

A61B 1736

606 9

A laser operation and control system preferably comprising a laser adapted to be grasped by a user and freely passed over a treatment area, control circuitry for activating and deactivating the laser, at least one boundary sensor operable to transmit a signal to the control circuitry to deactivate the laser upon passage thereof beyond a boundary of the treatment area and to transmit a signal to the control circuitry to activate the laser upon passage thereof within the boundary, and at least one proximity sensor for transmitting a signal to the control circuitry to deactivate the laser should the proximity sensor fail to sense a substantially solid surface within a predetermined distance therefrom and for transmitting a signal to the control circuitry to activate the laser should the proximity sensor sense such a surface.

4762127, Aug 9, 1988

Apr 15, 1987

7/038652

Krishna Narayanan - Pittsburgh PA
Marc D. Liang - Pittsburgh PA

The Montefiore Hospital Association of Western Pennsylvania - Pittsburgh PA

A61B 1711

128334R

An improved method for expanding the open ends of human vessels employs an expandable cell which can be inflated a bubble at the open end of a vessel. The method is carried out with a novel closed end cell which can be connected to a source of fluidized pressure such a hypodermic syringe and, in its relaxed state can be introduced into the open end of the vessel for subsequent expansion into a bubble of the desired diameter to cause uniform length extension of the open end of the vessel. The cell may be prestressed or weakened to establish the location of bubble formation within the cell.

4819640, Apr 11, 1989

Oct 1, 1986

6/914164

Krishna Narayanan - Pittsburgh PA
Marc D. Liang - Pittsburgh PA
Frank R. Walters - Pittsburgh PA

The Montefiore Hospital Association of Western Pennsylvania - Pittsburgh PA

A61B 1704

128334R

A microsurgery tool for use in anastomosis of small vessels has a thin shaft with a pair of forwardly projecting tines defining a throat for receiving the pointed end of a suture needle. The microsurgery tool is inserted between confronting ends of vessels into engagement with the inner wall of one vessel for receiving a suture needle point passing through the outer wall of the vessel and thereafter is withdrawn from the space between the vessels to engage the outer surface of the other vessel where it receives the pointed end of the same suture needle passing through the inner wall of the other vessel.

4957500, Sep 18, 1990

Oct 27, 1988

7/263518

Marc D. Liang - Pittsburgh PA
Krishna Narayanan - Pittsburgh PA
Eugene D. Ross - Southampton PA

Montefiore Hospital Association of Western Pennsylvania - Pittsburgh PA

A61B 1708

606157

A normally closed clamp is provided which is formed from two extruded elements which are connected together in their midregion by means of a non-circular cam on a base element and a corresponding non-circular cam surface on a clamping element. In the normally closed position, the cam and cam surface urge the device into a jaw-closed position with the handles being spaced-apart. When the handles are brought together, the jaw members separate and the relative position of the cam surface and the cam member is altered. The device may be used as a tissue separator. Two of the devices may be assembled together as a tendon approximator.

5345538, Sep 6, 1994

Jan 27, 1992

7/826339

Krishna Narayannan - Pittsburgh PA
Marc D. Liang - Pittsburgh PA
John L. Kurtz - Indiana PA

G10L 900

395 284

A system is provided with a voice activated control apparatus which permits precise control of one or more system variables by means of voice commands uttered by the system operator. When a system variable is in a movement or change mode, the movement or change is terminated by any sound exceeding a preestablished acoustic threshold level. Any value of one or more system variables can be identified and appropriate data stored in a memory to permit the one or more system variables to return to an identified value or state with a single voice command. The control apparatus is combined with a screen monitor and/or an acoustic speaker to provide visible and/or acoustic responses to an operator. The control apparatus is practical for retrofitting existing remotely controllable systems.

5059202, Oct 22, 1991

Jun 21, 1990

7/541505

Marc D. Liang - Pittsburgh PA
Krishna Narayanan - Pittsburgh PA
Eugene D. Ross - Southampton PA

The Montefiore Hospital Association of Western Pennsylvania - Pittsburgh PA

A61B 1700

606150

A tendon approximator employs two connected, normally closed clamps, which are each formed from two extruded elements. The two extruded elements are connected together in their mid-region by means of non-circular cam on a base element and a corresponding non-circular cam surface on a clamping element. In the normally closed position of the individual clamps, the cam and cam surface urge the device into a jaw-closed position with the handles being spaced apart. In a preferred embodiment two of the clamps are connected by means of rods extending through corresponding handle portions of the two clamps.