Patents by Inventor Aggelos Bletsas

Aggelos Bletsas 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).

  • Patent number: 10763990
    Abstract: Two ambient backscatter modulation methods and embodiments are disclosed, pseudo FSK and shifted BPSK. Embodiments of a receiver of signals for those modulations are also disclosed. Both methods disclosed allow for frequency-based networking of multiple backscatter devices when signals from an ambient, modulated radio frequency (RF) source are used for illumination. Disclosed method and apparatus exploit the inherent variation of the ambient modulated illuminating signal and offers performance improvement. Aspects of the disclosed invention also provide methods for passive jamming of full duplex transceivers and methods for assisting RF source localization.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: September 1, 2020
    Inventors: Georgios Vougioukas, Aggelos Bletsas
  • Patent number: 10395162
    Abstract: Ultra-low power and cost, purely analog backscatter sensors, based on capacitive and/or resistive principles, consumer electronics FM reception and extended range.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: August 27, 2019
    Inventors: Georgios Vougioukas, Aggelos Bletsas
  • Publication number: 20190258915
    Abstract: Ultra-low power and cost, purely analog backscatter sensors, based on capacitive and/or resistive principles, consumer electronics FM reception and extended range.
    Type: Application
    Filed: June 1, 2018
    Publication date: August 22, 2019
    Inventors: GEORGIOS VOUGIOUKAS, AGGELOS BLETSAS
  • Patent number: 8089887
    Abstract: A method and system provide routing of signals through a communications network. A transmitted signal is received. The signal has an associated parameter that is monitored as the signal is received. The parameter indicates the extent to which prior retransmission of the signal has occurred. The signal is retransmitted only if its parameter satisfies at least one predetermined criterion.
    Type: Grant
    Filed: November 19, 2002
    Date of Patent: January 3, 2012
    Assignee: Massachusetts Institute of Technology
    Inventors: Andrew Benjamin Lippman, David P. Reed, Aggelos Bletsas
  • Publication number: 20110297084
    Abstract: An all-additive apparatus for direct fabrication of nanometer-scale planar and multilayer structures that performs “pick-and-place” retrieval and deposition of materials comprises a tip and a controller and transport mechanism configured for causing the tip to acquire a transferable material and deposit at least a portion of the acquired transferable material at a predetermined location onto a substrate, without the use of a bridging medium, in order to directly assemble a structure. The tip may be submillimeter-scale, may comprise a plurality of sub-tips disposed in a predetermined arrangement, and/or may mechanically vibrate. Mechanical vibration of the tip may be monitored. The tip may acquire the transferable material from a reservoir. The assembled structure may be cured on the substrate.
    Type: Application
    Filed: August 15, 2011
    Publication date: December 8, 2011
    Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: Brian Hubert, Joseph Jacobson, Aggelos Bletsas
  • Patent number: 7998528
    Abstract: An all-additive method for direct fabrication of nanometer-scale planar and multilayer structures comprises the steps of acquiring a transferable material with a submillimeter-scale tip, depositing at least a portion of the acquired first transferable material at a predetermined location onto a substrate without a bridging medium, and repeating to create a structure using the transferable material.
    Type: Grant
    Filed: February 14, 2003
    Date of Patent: August 16, 2011
    Assignee: Massachusetts Institute of Technology
    Inventors: Brian Hubert, Joseph Jacobson, Aggelos Bletsas
  • Publication number: 20040095920
    Abstract: A method and system provide routing of signals through a communications network. A transmitted signal is received. The signal has an associated parameter that is monitored as the signal is received. The parameter indicates the extent to which prior retransmission of the signal has occurred. The signal is retransmitted only if its parameter satisfies at least one predetermined criterion.
    Type: Application
    Filed: November 19, 2002
    Publication date: May 20, 2004
    Inventors: Andrew Benjamin Lippman, David P. Reed, Aggelos Bletsas
  • Publication number: 20040026007
    Abstract: An all-additive method for direct fabrication of nanometer-scale planar and multilayer structures utilizes the tip of a scanning probe microscope and a material reservoir. True “pick-and-place” retrieval and deposition of materials with a wide range of electrical, chemical, and mechanical properties is thereby facilitated.
    Type: Application
    Filed: February 14, 2003
    Publication date: February 12, 2004
    Inventors: Brian Hubert, Joseph Jacobson, Aggelos Bletsas