Patents by Inventor Paolo Martelli
Paolo Martelli 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).
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Publication number: 20200268880Abstract: New preparative approach of dry powder vaccines for mucosal (e.g. nasal) administration for the purpose of human or animal immunization; it requires spraying a vaccine liquid dispersion, previously mixed with a sub-micron particulate adjuvant, onto a solid carrier while blending the mixture, followed by drying in mild conditions; the sub-micron particulate adjuvant is an O/W nanoemulsion stabilized with a polysaccharide. Improved dry powder vaccines are obtained in form of aggregated antigen-carrier particles, whereby the antigen is finely and firmly dispersed within the carrier; once in contact with the mucosal surface, the product quickly dissociates and releases the antigen component.Type: ApplicationFiled: February 20, 2020Publication date: August 27, 2020Applicant: UNIVERSITA' DEGLI STUDI DI PARMAInventors: Fabio Sonvico, Ruggero Bettini, Paolo Martelli, Paolo Borghetti, Luca Ferrari, Elena Canelli
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Patent number: 9571196Abstract: An optical communication system is disclosed. The optical communication system comprises an optical transmitter and a substantially circular multi-mode optical fiber. The optical transmitter comprises a generator of at least two free space circular vortices and comprises an optical element configured to receive the at least two free space circular vortices and to couple them to an input facet of the optical fiber. The optical fiber is configured to receive at the input facet the at least two free space circular vortices and is configured to generate therefrom at least two corresponding guided circular vortices having respective propagation constants, wherein the values of the propagation constants at a defined frequency are different each other.Type: GrantFiled: June 15, 2012Date of Patent: February 14, 2017Assignee: Politecnico do MilanoInventors: Paolo Martelli, Alberto Gatto, Mario Martinelli
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Publication number: 20140199066Abstract: An optical communication system is disclosed. The optical communication system comprises an optical transmitter and a substantially circular multi-mode optical fiber. The optical transmitter comprises a generator of at least two free space circular vortices and comprises an optical element configured to receive the at least two free space circular vortices and to couple them to an input facet of the optical fiber. The optical fiber is configured to receive at the input facet the at least two free space circular vortices and is configured to generate therefrom at least two corresponding guided circular vortices having respective propagation constants, wherein the values of the propagation constants at a defined frequency are different each other.Type: ApplicationFiled: June 15, 2012Publication date: July 17, 2014Applicant: POLITECNICO DI MILANOInventors: Paolo Martelli, Alberto Gatto, Mario Martinelli
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Patent number: 8437645Abstract: An optical communication system (100; 2300) comprises at least a transmitter (110) apt to emit a differential phase shift keying (DPSK) optical signal having a bit-rate equal to R, at least a receiving system (1200) for receiving the differential phase shift keying optical signal; and an optical link (130) optically connecting the transmitter and the receiving system for transmitting the DPSK optical signal from the transmitter to the receiving system, wherein the receiving system comprises a coherent optical receiving device (1205) apt to coherently receive the propagated DPSK optical signal and to emit at least one electrical signal (I) related to the received DPSK optical signal, and wherein the receiving system further comprises at least one electrical filter (270) for filtering the at least one electrical signal and having ?3 dB double-side bandwidth greater than or equal to 0.44 R and lower than or equal to 0.68 R, and at least one squarer (280) for squaring the at least one filtered electrical signal.Type: GrantFiled: December 6, 2007Date of Patent: May 7, 2013Assignee: Google Inc.Inventors: Pierpaolo Boffi, Lucia Marazzi, Paolo Martelli, Paola Parolari, Aldo Righetti
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Patent number: 8318075Abstract: An apparatus comprises a molding unit having a punch and a mold cavity movable along a path between an open position in which said punch and said mold cavity are distanced apart from each other to receive a dose of plastics therebetween, and a closed position in which said punch and said mold cavity interact to form an item by pressing said dose, said punch being kept not above said cavity along said path.Type: GrantFiled: September 14, 2009Date of Patent: November 27, 2012Assignee: Sacmi Cooperativa Meccanici Imola Societa' CooperativaInventors: Stefano Bergami, Paolo Martelli, Fabrizio Pucci
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Patent number: 8311411Abstract: A method of stabilizing the state of polarization of an optical radiation comprises: 1) applying sequentially to the optical radiation a first and a second controllable phase retardation; 2) detecting an optical power of at least a first polarized portion of the optical radiation obtained after step 1; 3) applying sequentially to the optical radiation obtained after step 1 a third and a fourth controllable phase retardation; 4) detecting an optical power of a further polarized portion of the optical radiation obtained after step 3; 5) controlling, responsive to the optical power of said first polarized portion, the second controllable phase retardation so as to maintain the polarization state of the optical radiation obtained after step 1 at a defined great circle r on a Poincare sphere; 6) in case the second controllable phase retardation reaches a first limit value, commuting the first controllable phase retardation between first and second values; 7) controlling, responsive to the optical power of said furType: GrantFiled: December 21, 2007Date of Patent: November 13, 2012Assignee: Google Inc.Inventors: Paolo Martelli, Mario Martinelli, Aldo Righetti
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Patent number: 8200087Abstract: A device and method for stabilizing the state of polarization of polarization multiplexed optical radiation including an identified channel is disclosed.Type: GrantFiled: March 2, 2011Date of Patent: June 12, 2012Assignee: Google Inc.Inventors: Pierpaolo Boffi, Lucia Marazzi, Paolo Martelli, Mario Martinelli, Aldo Righetti, Rocco Siano
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Publication number: 20110170870Abstract: A device and method for stabilizing the state of polarization of polarization multiplexed optical radiation including an identified channel is disclosed.Type: ApplicationFiled: March 2, 2011Publication date: July 14, 2011Inventors: Pierpaolo Boffi, Lucia Marazzi, Paolo Martelli, Mario Martinelli, Aldo Righetti, Rocco Siano
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Patent number: 7917031Abstract: A device and method for stabilizing the polarization of polarization multiplexed optical radiation includes an identified channel which is provided with a pilot signal.Type: GrantFiled: October 22, 2004Date of Patent: March 29, 2011Assignee: PGT Photonics S.p.A.Inventors: Pierpaolo Boffi, Lucia Marazzi, Paolo Martelli, Mario Martinelli, Aldo Righetti, Rocco Siano
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Publication number: 20100277798Abstract: A method of stabilizing the state of polarization of an optical radiation comprises: 1) applying sequentially to the optical radiation a first and a second controllable phase retardation; 2) detecting an optical power of at least a first polarized portion of the optical radiation obtained after step 1; 3) applying sequentially to the optical radiation obtained after step 1 a third and a fourth controllable phase retardation; 4) detecting an optical power of a further polarized portion of the optical radiation obtained after step 3; 5) controlling, responsive to the optical power of said first polarized portion, the second controllable phase retardation so as to maintain the polarization state of the optical radiation obtained after step 1 at a defined great circle r on a Poincare sphere; 6) in case the second controllable phase retardation reaches a first limit value, commuting the first controllable phase retardation between first and second values; 7) controlling, responsive to the optical power of said furType: ApplicationFiled: December 21, 2007Publication date: November 4, 2010Inventors: Paolo Martelli, Mario Martinelli, Aldo Righetti
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Publication number: 20100266291Abstract: An optical communication system (100; 2300) comprises at least a transmitter (110) apt to emit a differential phase shift keying (DPSK) optical signal having a bit-rate equal to R, at least a receiving system (1200) for receiving the differential phase shift keying optical signal; and an optical link (130) optically connecting the transmitter and the receiving system for transmitting the DPSK optical signal from the transmitter to the receiving system, wherein the receiving system comprises a coherent optical receiving device (1205) apt to coherently receive the propagated DPSK optical signal and to emit at least one electrical signal (I) related to the received DPSK optical signal, and wherein the receiving system further comprises at least one electrical filter (270) for filtering the at least one electrical signal and having ?3 dB double-side bandwidth greater than or equal to 0.44 R and lower than or equal to 0.68 R, and at least one squarer (280) for squaring the at least one filtered electrical signal.Type: ApplicationFiled: December 6, 2007Publication date: October 21, 2010Inventors: Pierpaolo Boffi, Lucia Marazzi, Paolo Martelli, Paola Parolari, Aldo Righetti
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Publication number: 20100032868Abstract: An apparatus comprises a moulding unit having a punch and a mould cavity movable along a path between an open position in which said punch and said mould cavity are distanced apart from each other to receive a dose of plastics therebetween, and a closed position in which said punch and said mould cavity interact to form an item by pressing said dose, said punch being kept not above said cavity along said path.Type: ApplicationFiled: September 14, 2009Publication date: February 11, 2010Applicant: Sacmi Cooperativa Meccanici Imola Societa' CooperativaInventors: Stefano Bergami, Paolo Martelli, Fabrizio Pucci
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Patent number: 7607909Abstract: An apparatus comprises a moulding unit having a punch and a mould cavity movable along a path between an open position in which said punch and said mould cavity are distanced apart from each other to receive a dose of plastics therebetween, and a closed position in which said punch and said mould cavity interact to form an item by pressing said dose, said punch being kept not above said cavity along said path.Type: GrantFiled: October 22, 2004Date of Patent: October 27, 2009Assignee: Sacmi Cooperativa Meccanici Imola Societa' CooperativaInventors: Stefano Bergami, Paolo Martelli, Fabrizio Pucci
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Patent number: 7528360Abstract: A polarization stabilizing device and method based on controlling the phase retardations of a pair of variable rotators with an optically interposed quarter-wave plate, with a controller such that the first of the variable rotators has its phase retardation switched between first and second values whenever the phase retardation of the second of the variable rotators reaches an upper or a lower limit. The upper and lower limits of the second rotator and the first and second values of the first rotator are chosen so that discontinuities in the power of the output optical radiation are avoided when the first variable rotator is switched, thereby providing endless polarization stabilization using rotators that themselves may have limited retardation ranges.Type: GrantFiled: September 6, 2005Date of Patent: May 5, 2009Assignee: PGT Photonics S.p.A.Inventors: Mario Martinelli, Paolo Martelli, Silvia Maria Pietralunga, Aldo Righetti
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Patent number: 7307722Abstract: A polarization stabilizing device and method based on controlling the phase retardation of a pair of variable phase retarders with a controller such that the first of the variable retarders has its phase retardation switched between first and second values whenever the phase retardation of the second of the variable retarders reaches an upper or a lower limit. The upper and lower limits of the second retarder and the first and second values of the first retarder are chosen so that discontinuities in the power of the output optical signal are avoided when the first variable retarder is switched, thereby providing endless polarization stabilization using phase retarders that themselves have only limited retardation ranges.Type: GrantFiled: July 30, 2002Date of Patent: December 11, 2007Assignee: Pirelli & C. S.p.A.Inventors: Mario Martinelli, Paolo Martelli, Silvia Maria Pietralunga
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Publication number: 20070280689Abstract: A device and method for stabilizing the polarization of polarization multiplexed optical radiation includes an identified channel which is provided with a pilot signal.Type: ApplicationFiled: October 22, 2004Publication date: December 6, 2007Applicant: PIRELLE & C. S.P.A.Inventors: Pierpaolo Boffi, Lucia Marazzi, Paolo Martelli, Mario Martinelli, Aldo Righetti, Rocco Siano
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Publication number: 20070071981Abstract: An apparatus comprises a moulding unit having a punch and a mould cavity movable along a path between an open position in which said punch and said mould cavity are distanced apart from each other to receive a dose of plastics therebetween, and a closed position in which said punch and said mould cavity interact to form an item by pressing said dose, said punch being kept not above said cavity along said path.Type: ApplicationFiled: October 22, 2004Publication date: March 29, 2007Inventors: Stefano Bergami, Paolo Martelli, Fabrizio Pucci
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Patent number: 6941032Abstract: In an interferometer configuration, a retarder in the form of a half-wave plate (125) and a phase shifter in the form of a glass plate (120) are arranged in one arm (114). The phase shifter provides an optical path difference between the interferometer arms which needs to be greater than the coherence length of the input light to be polarization stabilized. A polarizer in the form of a linear polarizer (118) aligned at 45° to the half-wave plate is arranged across both interferometer arms (114 & 116). Polarization stabilization action is achieved by the retarder in combination with the polarizer. More specifically, for at least one input polarization state, the polarization states in the two interferometer arms are rendered orthogonal by the retarder, the polarizer being aligned to allow only one of the two orthogonal states to be transmitted, the other being absorbed. The device is expected to find application for WDM networks based on broadband sources, such as superluminescent diodes.Type: GrantFiled: June 19, 2001Date of Patent: September 6, 2005Assignee: Pirelli Cavi e Sistemi S.p.A.Inventors: Mario Martinelli, Paolo Martelli, Angelo Barberis
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Publication number: 20040262499Abstract: A polarization stabilizing device and method based on controlling the phase retardation of a pair of variable phase retarders with a controller such that the first of the variable retarders has its phase retardation switched between first and second values whenever the phase retardation of the second of the variable retarders reaches an upper or a lower limit. The upper and lower limits of the second retarder and the first and second values of the first retarder are chosen so that discontinuities in the power of the output optical signal are avoided when the first variable retarder is switched, thereby providing endless polarization stabilization using phase retarders that themselves have only limited retardation ranges.Type: ApplicationFiled: August 9, 2004Publication date: December 30, 2004Inventors: Mario Martinelli, Paolo Martelli, Silvia Maria Pietralunga
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Publication number: 20020037126Abstract: In an interferometer configuration, a retarder in the form of a half-wave plate (125) and a phase shifter in the form of a glass plate (120) are arranged in one arm (114). The phase shifter provides an optical path difference between the interferometer arms which needs to be greater than the coherence length of the input light to be polarization stabilized. A polarizer in the form of a linear polarizer (118) aligned at 45° to the half-wave plate is arranged across both interferometer arms (114 & 116). Polarization stabilization action is achieved by the retarder in combination with the polarizer. More specifically, for at least one input polarization state, the polarization states in the two interferometer arms are rendered orthogonal by the retarder, the polarizer being aligned to allow only one of the two orthogonal states to be transmitted, the other being absorbed. The device is expected to find application for WDM networks based on broadband sources, such as superluminescent diodes.Type: ApplicationFiled: June 19, 2001Publication date: March 28, 2002Inventors: Mario Martinelli, Paolo Martelli, Angelo Barberis