U.S. patents available from 1976 to present.
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Isabella, David J.


Primary examiner statistics: 1958 patents; average approval time: 1958 days
Assistant examiner statistics: 427 patents; average approval time: 888 days

Patents as Assistant Examiner


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NumberTitleIssue Date
5095919Arcuate element and external fixation device
An arcuate cradle element for use in an external fixation device is generally in the shape of a partial or full circular toroid whose transverse cross-section comprises two opposed and symmetrical polygonal portions, joined by a web serving to connect and...
03/17/1992
4950298Modular knee joint prosthesis
A femoral component base having a pair of laterally spaced apart condylar portions, each of which has an external surface that is smoothly convexly curved anterior-posteriorly to match generally the distal profile of the anatomical femoral condyle and smo...
08/21/1990
4944762Joint endoprosthesis
The invention relates to a femoral hip-joint endoprosthesis having a shaft to be inserted into the medullary cavity (4) of the femur (1) and a support plate (7), which terminates the shaft proximally and the under surface (12) of which is provided for sup...
07/31/1990
4936861Acetabular cup prosthesis
The plastic cup-comprising member and the hemispherical shell of the two-part acetabular cup prosthesis are secured relative to one another in snap-fitted manner. The plastic member is centered and guided during pressing-in via a centering pin and concent...
06/26/1990
4936847Revision knee prosthesis
A revision knee prosthesis which includes augmentation blocks that may be added to the inferior surface of the femoral component of the prosthesis. The blocks have a post on one surface which is secured in a cavity in the inferior surface....
06/26/1990
4936851Analytic bone implant
A analytic bone implant includes a cylindrical housing with an inner chamber designed for collecting sample of bone tissues. The outer surface of the housing is provided with a plurality of threads for securing the implant into bone tissue. The housing is...
06/26/1990
4919665Implantation of articulating joint prosthesis
An intramedullary prosthesis, particularly but not exclusively a hip prosthesis, is provided comprising an articulating member at one end and a stem at the other. The stem is shaped to conform substantially to the transverse sections of the medullary cana...
04/24/1990
4919678Hip joint prosthesis having a cylindrical shaft portion
A hip joint prosthesis includes a first member having a shaft portion and a lateral arm extending toward a joint, the lateral arm being sloped in the direction of the joint and being adapted to receive a joint ball. The lateral arm has significantly great...
04/24/1990
4919664Stimulation of hair growth
The present invention relates to a method of stimulating hair growth in part of the skin of a mammal. The method comprises selecting lower follicular dermal cells and culturing them. An opening is then formed in the skin and the cultured dermal cells intr...
04/24/1990
4919675Hemispherical prosthetic acetabulum
The prosthetic acetabulum is formed of a metal shell structure of metal mesh and a plastic cup disposed in the shell structure. Both the shell structure and plastic cup have coincident meridian-disposed slots to permit the shell structure and cup to adapt...
04/24/1990
4919667Implant
A soft tissue implant in the form of a meniscus cartilage replacement for a patient. Appropriately shaped top and bottom layers sandwich therebetween at least one intermediate felted layer. A resilient bonding material coats the layers and holds same in a...
04/24/1990
4911720Particular surface replacement prosthesis
An articular surface prosthesis composed of a porous material that is substantially noncorrodible and nonbiodegradible by body fluids. The prosthesis serves as a replacement of, for example, a femoral cap. The prosthesis fits over the femur which is shape...
03/27/1990
4911718Functional and biocompatible intervertebral disc spacer
The construction and manufacturing technique for a functional biocompatible intervertebral disc spacer is described. This device is useful for a replacement for a degenerated disc in certain treatments of back pain and spinal disease. The disc spacer poss...
03/27/1990
4911725Golfing attachment for prosthesis
A golfing attachment for connecting a golf club to a prosthesis comprises a base portion, a coupling attached to and extending from one end of the base portion for connection to a prosthesis, and a flexible and resilient plastic tube. The tube extends axi...
03/27/1990
4911723Artificial hip joint
The invention relates to an artificial hip joint, in which the surfaces of both the socket and the ball of the joint are in the form of rotational bodies (rotational surfaces) deviating from the normal spherical shape. The rotational surfaces are in the f...
03/27/1990
4911717Intravasular artificial organ
The intravascular artificial organ is comprised of a flexible, hollow, semipermeable catheter containing living cells or tissue. The catheter is constructed of material with a pore size resulting in a molecular weight cutoff of approximately 50,000 Dalton...
03/27/1990
4908033Hip joint acetabulum
The hip joint acetabulum uses a synthetic ring for snap-fitting the acetabulum body within the outer bowl. The ring is slit to provide for the snap fit connection and is provided with an annular lug which projects into an annular groove within the outer b...
03/13/1990
4908032Reconstruction prosthesis
A hip prosthesis has a stem which is to be anchored in the femur bone and has a transverse surface for support on a subtrochanteric bone surface. The transverse surface comprises a plurality of support parts which engage in the bone at mutual spacings and...
03/13/1990
4908035Prosthesis for a hip joint
The prosthesis is provided with a medial narrow side which extends on a hyperbola from a conical distal section to a boundary plane at which the blade is connected to the neck of the prosthesis. The vertex of the hyperbola is disposed at the point of inte...
03/13/1990
4908034Endoprosthetic bone joint components
An endoprosthetic bone component is produced from parts respectively having a projection and cavity engaged in a mutual clearance fit, and a third part of plastics material located in the space of such fit, the space and third part being dimensioned to in...
03/13/1990
4904264Artifical joint system
The invention relates to an artificial joint system which, by a combination of defined pretension in the implant in the resection plane and a wholly or partially resorbable shaft or clamping system connects, after a transition period after implantation, t...
02/27/1990
4904269Hip joint prosthesis
A hip prosthesis having a stem (1) for introduction into the medullary cavity of a femur (13) and a head (2) which replaces a natural femoral head is characterized in that a plate-like anchoring member (3) is movably mounted at or near to the proximal end...
02/27/1990
4904265Cementless acetabular implant
A cementless acetabular implant intended for use in instances of a bony defect in the pelvis at the acetabular cavity requiring substantial rebuilding of the acetabulum by use of bone graft material. It includes a substantially rigid metallic hemispherica...
02/27/1990
4904263Prosthesis with interlocking fixation and providing reduction of stress shielding
A prosthesis including a load receiving surface for receiving a load applied to the prosthesis, a first surface provided with interlocking means for interlocking fixation of a first bone portion and for transferring a portion of the applied load to the fi...
02/27/1990
4904258Biocompatible, hydrophilic material, method of manufacture and uses of same
A biocompatible hydrophilic material is based on purified cellulose, from which material all or the majority of the water has been removed and which has a modulable potential for water recovery of up to an amount of water of approximately 60%. The materia...
02/27/1990
4904256Magnetic artificial anus having sphincter function
A magnetic artificial anus assembly comprising a combination of an annular bag structure formed of a bio-affinitive flexible material and filled with a magnetic fluid and a plug structure having a magnet member. It has a sphinter function similar to the n...
02/27/1990
4904267Method and device for fixing a joint prosthesis
The invention comprises a method and a device for fixing a joint prosthesis (1, 2; 5) in which all surfaces intended for tissue contact consist of titanium or a titanium-based tissue-compatible metallic material. For safely anchoring the prosthesis in rel...
02/27/1990
4904262Joint prosthesis and process for its manufacture
Joint prosthesis of perforated sheet metal strips which, for the formation of a hollow shaft, are welded together and to a collar having a protrusion for attaching to a ball joint. The collar is provided with an opening leading to the inside of the hollow...
02/27/1990
4904266Bone joint implant and method
A prosthetic device is shown for repair or replacement of joints of skeletal bones. The device includes an elongated stem having a linear axis which defines a distal end and a proximal portion. An articulating ball extends outwardly from the proximal port...
02/27/1990
4902289Multilayer bioreplaceable blood vessel prosthesis
Process for forming a multilayer blood vessel prosthesis. Each layer is formed from bioreplaceable materials which include those produced by contacting collagen with an aminopolysaccharide and subsequently covalently crosslinking the resluting polymer, po...
02/20/1990
4902294Implantable mammary prosthesis adapted to combat the formation of a retractile shell
An implantable mammary prosthesis designed to combat the formation around it of a retractile shell in reaction to a foreign body comprises a pocket with a front wall that can be inflated to a dome shape by injecting a physiological serum through a valve. ...
02/20/1990
4895572Interlocking femoral prosthesis device
The present invention relates to a new and improved design for a device utilized as an interlocking femoral prosthesis under medical circumstances wherein either the femoral bone is fractured or there exists total hip failure requiring a hip replacement. ...
01/23/1990
4895571Stem for tibia part of a knee joint endoprosthesis
The stem for the tibia part of knee joint endoprostheses has the features that its cross-section is made arcuate at the back and angular medial ridge with the apex pointing in the direction of walking....
01/23/1990
4894063Barrier layer for implantable tendons and ligaments
Disclosed is a method of interfacing a ligament substitute within a channel of resected bone with a sleeve of soft biological tissue. The sleeve of tissue has overall external dimension sufficient to extend through at least a portion of the resected bone ...
01/16/1990
4894064Endoprosthesis for a hip-joint socket
A shell sleeve serves for the reception of a bearing socket. The shell sleeve possesses the shape of a body of revolution or rotation which tapers or narrows towards a pole region. This body of revolution carries at its outer surface a self-tapping thread...
01/16/1990
4892548Joint socket
The external surface of the hip joint socket is provided with a contrast ring in a diametric plane of the joint head receiving cavity as well as with a metallic measuring ring in the upper surface of the socket body. The measuring ring is concentric to th...
01/09/1990
4892549Dual-radius acetabular cup component
An acetabular cup has a shell component with an outer surface including a first spherical surface portion and a second spherical surface portion, and an acetabulum is prepared with an inner surface having a spherical configuration complementary to the sec...
01/09/1990
4892552Orthopedic device
An orthopedic device formed from a composite material which is reinforced with continuous filament carbon fibers to provide the material with high flexural strength, hydrolytic stability and a medical grade quality. A preferred embodiment of the orthopedi...
01/09/1990
4892551Impact dissipating and load diverting total hip arthroplasty prosthesis
A composite total hip arthroplasty prosthesis including a shock-absorbing, elastomeric polymer cushion located between acetabular and subtrocanteric aspects to reduce the impact factor of an intraskeletal load applied through a patient's pelvis to the pro...
01/09/1990
4888018Method of positioning and securing a chin implant
A method of applying a chin implant to a human, the method including the steps of positioning a resilient preformed chin implant against an area of the chin to be enhanced, the implant having an interior radius having a curvature slightly smaller than the...
12/19/1989
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