Isaac H Cohen

6428773, Aug 6, 2002

Jan 13, 2000

09/482586

Jennifer Oko - Stony Brook NY
Isaac D. Cohen - Brooklyn NY

Color Access, Inc. - Melville NY

A61K 7021

424 63, 106415, 106417, 106418, 106436, 106459, 424 64, 424401, 424489

The invention relates to a cosmetic composition, containing a four-layered interference pigment comprising an innermost layer of mica, a first outer layer of a colored pigment, a second outer transparent layer, and an outermost layer of a colored pigment, combined with a traditional interference pigment. The compositions, when applied to a facial or body surface, emphasize the contours of the surface, creating greater depth and dimension. The compositions are particularly useful as lip products, to create a fuller, plumper look to the lips.

6442047, Aug 27, 2002

Aug 25, 2000

09/648837

Isaac Cohen - Dix Hills NY

Lambda Electronics, Inc. - Melville NY

H02M 3335

363 17, 363132

A power conversion apparatus, e. g. , a DC-to-DC converter, includes a transformer having primary and secondary windings. A first switching circuit has an input port configured to be coupled across a DC power source and an output port coupled to the primary winding of the transformer. A switch control circuit is operatively associated with the switching circuit and causes the switching circuit to alternately apply first and second polarity voltages to the primary winding. A second switching circuit is operative to transfer energy to a load from the secondary winding via a first capacitor responsive to application of the first polarity voltage to the primary winding and to transfer energy to the load from the secondary winding via a second capacitor responsive to application of the second polarity voltage to the primary winding. The first switching circuit may be operated such that switches therein may be operated under reduced current and/or reduced voltage conditions. Related power conversion methods are also discussed.

6511672, Jan 28, 2003

Jan 17, 2001

09/764027

Manuel L. Tan - Westbury NY
Isaac David Cohen - Brooklyn NY
Marie Albers - West Islip NY
Jennifer Oko - Stony Brook NY

Color Access, Inc. - Melville NY

A61K 600

424401, 424 63, 424 69

The present invention provides a method of preventing the appearance of fine lines, wrinkles and discoloration on the skin. This is achieved by the topical application to the skin of a composition containing a first platelet of alumina treated with a metal oxide, a second platelet treated with a spherical scattering component, and a cosmetic or pharmaceutical carrier. The compositions can also contain a standard interference pigment, such as a white and a yellow interference pigment to further blend the color to closely match the natural skin tone. The combination of pigments and platelets creates a mosaic of color and optically manipulates light such that lines, wrinkles, disfigurations and discolorations on the skin appear to substantially vanish. In addition to the pigments and platelet components, a non-interference pigment can also be added to fine-tune the matching of color to the skin tone. The alumina platelet alone is metallic-looking; however, when it is tempered with the other platelet containing the spherical scattering component, the net effect is that the skin appears natural, luminous and flawless.

6606259, Aug 12, 2003

Aug 23, 2001

09/935999

Isaac Cohen - Dix Hills NY

Lambda Electonics, Inc. - Melville NY

H02H 7122

363 5601, 363 5612, 323247, 323908

A power converter apparatus, such as a DCâDC converter, includes a switch that controls current transfer between an input port and an inductance. A control circuit is operative, while current is being transferred between the inductance and a clamping circuit, to control the switch responsive to a current in the inductance. For example, the control circuit may include a current sensor configured to be coupled in series with the inductance and a switch control circuit operative to control the first switch responsive to a current sense signal generated by the current sensor. The switch control circuit may be operative to prevent transition of the switch from the first state to the second state until the current sense signal meets a predetermined criterion, e. g. , a signal state indicative of a desired current condition, such as a current approximating zero or a current reversal. Related operating methods are also discussed.

6703817, Mar 9, 2004

Mar 7, 2002

10/093269

Isaac Cohen - Dix Hills NY

Lambda Electronics, Inc. - Plainview NY

G05F 140

323282, 363 17

A power converter apparatus includes a transformer having a primary winding and a secondary winding, a switching circuit operative to couple and decouple the primary winding of the transformer to a power source, and a control circuit that controls the switching circuit. A feedback circuit is coupled to the output port of a power transfer network and to the control circuit. The feedback circuit generates a current responsive to an output voltage at an output port of a power transfer network, charges a capacitance responsive to the generated current, and intermittently discharges the capacitance responsive to a control signal generated by the control circuit. A modulator circuit is coupled to the feedback circuit and to the power transfer network, and selectively couples the secondary winding of the transformer to an input port of the power transfer network responsive to a voltage on the capacitance. The invention may be embodied as apparatus or methods.

6744647, Jun 1, 2004

Apr 12, 2002

10/121916

Isaac Cohen - Dix Hills NY

Lambda Electronics, Inc. - Plainview NY

H02H 7122

363 71, 363 72, 363 50, 363 55

A power converter apparatus includes an input port and an output port. First and second inductors are coupled to the output port. A first switching circuit is coupled to the input port and the first inductor. The first switching circuit is operative to repetitively perform a cycle including a first state in which the first switching circuit couples the first inductor to the input port such that energy is transferred from the input port to the first inductor, a second state in which the first switching circuit short circuits the first inductor, and a third state in which the first switching circuit decouples the first inductor such that energy is transferred from the first inductor to the output port. A second switching circuit is coupled to the input port and the second inductor and implements a similar cycle. The second switching circuit may operate such that the first and second states of the second switching circuit substantially coincide with the third state of the first switching circuit.

6961253, Nov 1, 2005

Oct 6, 2000

09/684850

Isaac Cohen - Dix Hills NY, US

Lambda Electronics - Melville NY

H02M003/335

363 89, 363 97

A method and system for providing synchronous rectification in power converters that includes controlling turnoff of a synchronous rectifier according to a timing signal representative of the switching time of a switch that is coupled to input of the power converter. Such a timing signal may be obtained directly or indirectly in various ways; for example, by sensing the voltage across the primary switch, or by sensing the drive voltage of the primary switch. Additional alternatives in an isolated converter having a transformer with a primary winding that is selectively coupled to the electrical power source includes sensing the primary winding voltage, for example, by directly sensing the primary voltage or by sensing the voltage across an auxiliary winding that is closely coupled to the primary winding.

7098631, Aug 29, 2006

May 13, 2004

10/709553

Isaac Cohen - Dix Hills NY, US

Lambda Americas, Inc. - San Diego CA

G05F 1/10
G05F 1/40

323222, 323285, 323205

A power factor correcting converter includes a control circuit that modulates on and off intervals of a power switch so that a momentary input current of the converter is directly proportional to both a momentary value of an input voltage of the converter and to a momentary value of a current absorbed by a load coupled to an output of the converter.