1
Charles W Cha: Surgical instrument for orthopedic surgery. Spinascope, Duanc Morris, July 17, 2012: US08221424 (177 worldwide citation)

A rotatable surgical instrument having a protective hood with articulating bendable distal end is provided to improve and enable various orthopedic surgical procedures such as arthroscopy. The protective hood surrounds the surgical tool bit exposing only a portion of the tool bit for removing bone o ...


2
Charles W Cha: Dissecting high speed burr for spinal surgery. Spinascope, Duane Morris, September 8, 2009: US07585300 (50 worldwide citation)

A rotatable surgical burr (100, 200, 300, 500) having a protective hood (120, 220, 320, 520, 620, 720) with a dissecting foot plate (119, 219, 319, 519, 619, 719) is provided to improve and enable various spinal decompression procedures. The surgical burr's protective hood has a dissecting foot plat ...


3
Charles W Cha, John W Hartman, David A Kiesling, William J Scarpero Jr: Oscillation prevention during testing of integrated circuit logic chips. International Business Machines Corporation, Mitchell S Bigel, Wesley DeBruin, November 12, 1985: US04553049 (5 worldwide citation)

Integrated circuit logic chips often oscillate during testing because the large unbypassed inductance of the test fixture causes off-chip driver switching noise to be fed back to the logic chip power supply. Oscillation may be prevented by adding an inhibit receiver and an off-chip driver inhibit ne ...


4
Charles W Cha: Surgical instrument for orthopedic surgery. Spinascope, Duane Morris, May 6, 2014: USRE044883

A rotatable surgical instrument having a protective hood with articulating bendable distal end is provided to improve and enable various orthopedic surgical procedures such as arthroscopy. The protective hood surrounds the surgical tool bit exposing only a portion of the tool bit for removing bone o ...


5
Charles W Cha: Dissecting high speed burr for spinal surgery. Spinascope, Duane Morris, May 13, 2014: USRE044896

A rotatable surgical burr (100, 200, 300, 500) having a protective hood (120, 220, 320, 520, 620, 720) with a dissecting foot plate (119, 219, 319, 519, 619, 719) is provided to improve and enable various spinal decompression procedures. The surgical burr's protective hood has a dissecting foot plat ...


6
Charles W Cha: Dissecting high speed burr for spinal surgery. Duane Morris, July 28, 2005: US20050165420-A1

A rotatable surgical burr (100, 200, 300, 500) having a protective hood (120, 220, 320, 520, 620, 720) with a dissecting foot plate (119, 219, 319, 519, 619, 719) is provided to improve and enable various spinal decompression procedures. The surgical burr's protective hood has a dissecting foot plat ...


7
Charles W Cha: Surgical instrument for orthopedic surgery. Spinascope, DUANE MORRIS Princeton, March 4, 2010: US20100057087-A1

A rotatable surgical instrument having a protective hood with articulating bendable distal end is provided to improve and enable various orthopedic surgical procedures such as arthroscopy. The protective hood surrounds the surgical tool bit exposing only a portion of the tool bit for removing bone o ...