Long P Tran

8204209, Jun 19, 2012

Mar 7, 2008

12/044054

Qing-Guang Liu - Sunnyvale CA, US
Wilson Or - Belmont CA, US
Long Tran - Milpitas CA, US
Victor Mei - Palo Alto CA, US

Fortemedia, Inc. - Sunnyvale CA
Maxsonics, Inc. - Santa Clara CA

H04M 9/08

37940606

A telephone system comprising an analog telephone and a full-duplex speakerphone adapter is disclosed. The analog telephone comprises an ordinary analog telephone subscriber circuit for transmitting and receiving analog signals and a handset for users. The full-duplex speakerphone adapter is coupled between the analog telephone and a central office, uses a subscriber loop interface circuit through the first telephone line to couple to the ordinary analog telephone subscriber circuit of the analog telephone and uses a telephone hybrid interface circuit through the second telephone line to couple to a wall jack to communicate with the central office.

53922760, Feb 21, 1995

Mar 7, 1994

8/207320

Long Tran - Milpitas CA

First Pacific Networks, Inc. - San Jose CA

H04B 156
H04B 7212
H04L 514

370 29

In a digital communications system with a time-division multiplexed medium having a transmit r. f. channel and a receive r. f. channel on an internal network having a head end multiplexer and interface for external connection of calls, timeslots are allocated to maximize time slot usage between internal calls and external calls by dynamically differentiating between internal call types and external call types, or calls between nodes within the internal network between an internal node on the internal network and an external node connected through a trunk, and, based on differentiation for the external call types, claiming a free timeslot for the internal node on the transmit r. f. channel and using the corresponding timeslot on the receive r. f. channel to establish communication between the internal node and the external node.

50329359, Jul 16, 1991

Dec 12, 1989

7/449686

Stephen A. Jove - Watsonville CA
Klaas B. Klaassen - San Jose CA
Long Tran - San Jose CA

International Business Machines Corporation - Armonk NY

G11B 502
G11B 5127

360 67

A circuit for producing a signal whose magnitude is a chosen amplitude compensation characteristic of the signals produced by a magnetoresistive (MR) element comprising an input stage which produces an amplified output signal which is coupled to the output stage, and control signals proportional to the resistance of the MR element and inversely proportional to the resistance of the MR element which are coupled to a feedforward circuit. The feedforward circuit generates a chosen amplitude equalization characteristic of the signals coupled to the feedforward circuit, and this signal is coupled to a bias terminal of the output stage so that the output stage produces a signal representing the chosen amplitude compensation characteristic of the signals produced by the MR element.

52727009, Dec 21, 1993

Oct 17, 1991

7/778031

David E. Hansen - Sunnyvale CA
Robert P. McNamara - San Jose CA
James C. Long - Sunnyvale CA
Michael J. Serrone - Sunnyvale CA
Chinh Q. Phan - Fremont CA
Long K. Tran - Milpitas CA

First Pacific Networks, Inc. - Sunnyvale CA

H04J 302

370 853

A baseband signal is spectrally efficiently transmitted on a broadband transmission medium by inserting gaps in packets of digital data transmitted in a modulated first radio frequency carrier. The transmitted packets of data are received by demodulating the modulated first radio frequency carrier, and the gap is monitored for the presence of digital data thus indicating a collision of simultaneously transmitted packets of digital data. A seed of arbitrary digital bits are used in scrambling each packet of digital data and is transmitted with the packet of data for use in descrambling the data. In retransmitting the packet of data the seed is included. The originally transmitting node receives the retransmitted packet and compares the retransmitted seed with the originally transmitted seed for detecting an error in retransmission.