Patents by Inventor Scott T. Ma

Scott T. Ma has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Self leveling operation stage for ultrasonic welding
    Patent number: 6019154
    Abstract: A manufacturing process, such as that used for ultrasonic welding, employs a self-leveling fixture (20) including a base (12) and an operation stage (14) that are separated by leveling devices (16) and 18). The leveling devices include a centrally located spherical plane bearing (16) and one or more spring members (18) disposed about the periphery of the operation stage. In this way, the operation stage can react in response to pressure applied thereto complying to the applied pressure, thus providing a realistic self-leveling feature. After the pressure is removed, the return to a normal position via the spring action of spring (18).
    Type: Grant
    Filed: July 6, 1998
    Date of Patent: February 1, 2000
    Assignee: Motorola, Inc.
    Inventors: Scott T. Ma, Xinpei Lu, Mark S. Bresin
  • Shield assembly
    Patent number: 5383098
    Abstract: An electronic device assembly (100)includes a chassis (102), printed circuit boards (108 and 110), and a shield member (128). By placing the circuit boards (108 and 110) inside of chassis (102) and then engaging shield member (128), the printed circuits boards (108 and 110) are retained in place and shielded without the use of any other components. Shield member (128) includes a set of spring fingers (114) having tabs (116) which latch onto recesses (106) located on the side walls (132) of chassis (102). Upon the shield member (128) being engaged to chassis (102), the side walls (122) located on shield (128) press against printed circuit boards (108 and 110) and retain them in position without the use of additional fasteners.
    Type: Grant
    Filed: October 9, 1992
    Date of Patent: January 17, 1995
    Assignee: Motorola, Inc.
    Inventors: Scott T. Ma, William C. Phelps, III
  • Slide switch assembly
    Patent number: 5365027
    Abstract: Switch assembly (100) includes a housing (112) having a pair of spring finger contacts (114and 116) and a circuit board (144). A spring loaded actuator (134) is slideably located within housing (112) between first and second switching positions. Actuator (134) includes a pair of conductive wipers (136 and 138) which move relative to metalized traces (146, 148 and 150) located on the top surface of circuit board (144). Switch assembly (100) provides for a compact surface mountable switch which is capable of switching RF signals between a radio antenna (618) and an external accessory connector while minimizing electrical signal path lengths and moving parts in the switch assembly.
    Type: Grant
    Filed: November 3, 1992
    Date of Patent: November 15, 1994
    Assignee: Motorola, Inc.
    Inventors: Lawrence E. Marvet, Scott T. Ma, Son Q. Le, Douglas D. Peebles, David Karl, William C. Phelps, III