Il Young Pak

52568377, Oct 26, 1993

Oct 30, 1991

7/787319

Il Y. Pak - City of Industry CA

G10K 1300

181164

A cone formed from paper such as used in speaker as a diaphragm, wherein the wing portions, which may function to reinforce the cone, are selectively arranged and extending from any point in the periphery of the larger diameter circle to any point in the smaller diameter circle of the cone which has a frusto-conical shape and a coating layer is applied to the entire surface of the cone, and a method for making a cone using a sheet of paper, wherein the method comprises steps of cutting a sheet of paper into a desired pattern simultaneously with seaming at least a pair of folding portions composed of a centeral folding line and two lateral folding lines equi-angularly and symmetricaly displaced to each side of the center line, forming wing portions by folding said lines, honding the facing surfaces of the folded portions and, coating the entire surface of the entire surface of the cone with moisture-proof material.

60021179, Dec 14, 1999

Mar 10, 1998

9/038359

Il Young Pak - Rowland Heights CA

H05B 100
H05B 302

219549

A heating cord utilizes a non-heating core conductor that is wrapped with a high temperature insulator. The high temperature insulator is wrapped with a heat resistant insulator, wherein the heat resistant insulator is spirally wound with a heat generating wire. Finally, an insulation sheath covers entire embodiment forming a heat-generating cord. The core conductor and the heat generating wire are connected, forming a single electronic circuit wherein the electric current flowing along the core conductor flows in the opposite direction of the electric current flowing along the heat generating wire. As a result, the opposing electromagnetic fields generated by the opposing flows of electric current neutralize each other and function to reduce electromagnetic field emissions generally known to be harmful to humans. The present design allows safe operation well above the approximate 100 watt limitation inherent in designs that utilize resistive, heating-generating core elements.