Patents by Inventor Tomoyuki Yoshie
Tomoyuki Yoshie 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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Patent number: 11931453Abstract: Embodiments of the invention include devices, compositions and methods for the controlled release of therapeutic substances, such as drugs. Control over the rate of release of the therapeutic substances from the devices is achieved by the use of nanoporous membranes in which the pore size is matched to the molecular diameter of the therapeutic substances. Some embodiments of the invention achieve zero-order release by the use of membranes with a pore diameter that is more than five times the Stokes' diameter of the therapeutic substance released.Type: GrantFiled: September 7, 2021Date of Patent: March 19, 2024Assignee: Nano Precision Medical, Inc.Inventors: Adam D. Mendelsohn, Kathleen E. Fischer, Tomoyuki Yoshie, Wouter Roorda
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Publication number: 20210401735Abstract: Embodiments of the invention include devices, compositions and methods for the controlled release of therapeutic substances, such as drugs. Control over the rate of release of the therapeutic substances from the devices is achieved by the use of nanoporous membranes in which the pore size is matched to the molecular diameter of the therapeutic substances. Some embodiments of the invention achieve zero-order release by the use of membranes with a pore diameter that is more than five times the Stokes' diameter of the therapeutic substance released.Type: ApplicationFiled: September 7, 2021Publication date: December 30, 2021Applicant: NANO PRECISION MEDICAL, INC.Inventors: Adam D. Mendelsohn, Kathleen E. Fischer, Tomoyuki Yoshie, Wouter Roorda
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Patent number: 11129791Abstract: Embodiments of the invention include devices, compositions and methods for the controlled release of therapeutic substances, such as drugs. Control over the rate of release of the therapeutic substances from the devices is achieved by the use of nanoporous membranes in which the pore size is matched to the molecular diameter of the therapeutic substances. Some embodiments of the invention achieve zero-order release by the use of membranes with a pore diameter that is more than five times the Stokes' diameter of the therapeutic substance released.Type: GrantFiled: November 29, 2018Date of Patent: September 28, 2021Assignee: NANO PRECISION MEDICAL, INC.Inventors: Adam D. Mendelsohn, Kathleen E Fischer, Tomoyuki Yoshie, Wouter E. Roorda
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Publication number: 20190091140Abstract: Embodiments of the invention include devices, compositions and methods for the controlled release of therapeutic substances, such as drugs. Control over the rate of release of the therapeutic substances from the devices is achieved by the use of nanoporous membranes in which the pore size is matched to the molecular diameter of the therapeutic substances. Some embodiments of the invention achieve zero-order release by the use of membranes with a pore diameter that is more than five times the Stokes' diameter of the therapeutic substance released.Type: ApplicationFiled: November 29, 2018Publication date: March 28, 2019Applicant: Nano Precision Medical, Inc.Inventors: Adam D. Mendelsohn, Kathleen E Fischer, Tomoyuki Yoshie, Wouter E. Roorda
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Patent number: 9770412Abstract: The present invention provides a method for controlling the internal diameter of nanopores to afford nanopore membranes with a zero-order rate of release of a therapeutic agent.Type: GrantFiled: January 23, 2015Date of Patent: September 26, 2017Assignee: NANO PRECISION MEDICAL, INC.Inventors: Adam D. Mendelsohn, Kathleen Fischer, Tomoyuki Yoshie
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Patent number: 9547188Abstract: Various optical isolators are disclosed. One embodiment provides an optical isolator comprising a waveguide that includes polymer magneto-optical media. In a particular embodiment, the waveguide is dimensioned for single mode operation in the selected isolation range. A cross-section of the waveguide is inhomogeneous in terms of magneto-optical materials. Polymer magneto-optical material is a part of the optical waveguide structure. The inhomogeneity induces the propagation constant shift, which is propagation-direction-dependent. An embodiment is characterized by a cutoff frequency for forward propagating waves that is different than the cutoff frequency for reverse waves; the dimensions and direction of magnetization of the waveguide can be tailored so that, in a particular embodiment, the cutoff frequency for forward propagating waves is lower than the cutoff frequency for reverse waves.Type: GrantFiled: October 26, 2015Date of Patent: January 17, 2017Assignee: Duke UniversityInventor: Tomoyuki Yoshie
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Publication number: 20170000731Abstract: The present invention provides a method for controlling the internal diameter of nanopores to afford nanopore membranes with a zero-order rate of release of a therapeutic agent.Type: ApplicationFiled: January 23, 2015Publication date: January 5, 2017Inventors: Adam D. Mendelsohn, Kathleen Fischer, Tomoyuki Yoshie
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Publication number: 20160187676Abstract: Various optical isolators are disclosed. One embodiment provides an optical isolator comprising a waveguide that includes polymer magneto-optical media. In a particular embodiment, the waveguide is dimensioned for single mode operation in the selected isolation range. A cross-section of the waveguide is inhomogeneous in terms of magneto-optical materials. Polymer magneto-optical material is a part of the optical waveguide structure. The inhomogeneity induces the propagation constant shift, which is propagation-direction-dependent. An embodiment is characterized by a cutoff frequency for forward propagating waves that is different than the cutoff frequency for reverse waves; the dimensions and direction of magnetization of the waveguide can be tailored so that, in a particular embodiment, the cutoff frequency for forward propagating waves is lower than the cutoff frequency for reverse waves.Type: ApplicationFiled: October 26, 2015Publication date: June 30, 2016Applicant: DUKE UNIVERSITYInventor: Tomoyuki Yoshie
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Patent number: 9170440Abstract: Various optical isolators are disclosed. One embodiment provides an optical isolator comprising a waveguide that includes polymer magneto-optical media. In a particular embodiment, the waveguide is dimensioned for single mode operation in the selected isolation range. A cross-section of the waveguide is inhomogeneous in terms of magneto-optical materials. Polymer magneto-optical material is a part of the optical waveguide structure. The inhomogeneity induces the propagation constant shift, which is propagation-direction-dependent. An embodiment is characterized by a cutoff frequency for forward propagating waves that is different than the cutoff frequency for reverse waves; the dimensions and direction of magnetization of the waveguide can be tailored so that, in a particular embodiment, the cutoff frequency for forward propagating waves is lower than the cutoff frequency for reverse waves.Type: GrantFiled: March 14, 2014Date of Patent: October 27, 2015Assignee: Duke UniversityInventor: Tomoyuki Yoshie
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Publication number: 20140314371Abstract: Various optical isolators are disclosed. One embodiment provides an optical isolator comprising a waveguide that includes polymer magneto-optical media. In a particular embodiment, the waveguide is dimensioned for single mode operation in the selected isolation range. A cross-section of the waveguide is inhomogeneous in terms of magneto-optical materials. Polymer magneto-optical material is a part of the optical waveguide structure. The inhomogeneity induces the propagation constant shift, which is propagation-direction-dependent. An embodiment is characterized by a cutoff frequency for forward propagating waves that is different than the cutoff frequency for reverse waves; the dimensions and direction of magnetization of the waveguide can be tailored so that, in a particular embodiment, the cutoff frequency for forward propagating waves is lower than the cutoff frequency for reverse waves.Type: ApplicationFiled: March 14, 2014Publication date: October 23, 2014Applicant: DUKE UNIVERSITYInventor: Tomoyuki YOSHIE
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Patent number: 8855451Abstract: Various optical isolator embodiments are disclosed. Embodiments comprise a waveguide section utilizing materials that induce a propagation constant shift that is propagation-direction-dependent. Embodiments are characterized by a cutoff frequency for forward propagating waves that is different than the cutoff frequency for reverse waves. A particular embodiment is constructed as a single-mode waveguide on a substrate. The cross-section of the waveguide is inhomogeneous in terms of materials. This inhomogeneity induces a propagation constant shift, which is propagation-direction-dependent. This device works as an optical isolator from the cut-off frequency of the lowest forward wave (lower frequency) to one for the lowest reverse wave (higher frequency). Various configurations consistent with the principles of the invention are disclosed.Type: GrantFiled: July 20, 2012Date of Patent: October 7, 2014Assignee: Duke UniversityInventors: Tomoyuki Yoshie, Lingling Tang, Samuel Drezdzon
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Publication number: 20130016943Abstract: Various optical isolator embodiments are disclosed. Embodiments comprise a waveguide section utilizing materials that induce a propagation constant shift that is propagation-direction-dependent. Embodiments are characterized by a cutoff frequency for forward propagating waves that is different than the cutoff frequency for reverse waves. A particular embodiment is constructed as a single-mode waveguide on a substrate. The cross-section of the waveguide is inhomogeneous in terms of materials. This inhomogeneity induces a propagation constant shift, which is propagation-direction-dependent. This device works as an optical isolator from the cut-off frequency of the lowest forward wave (lower frequency) to one for the lowest reverse wave (higher frequency). Various configurations consistent with the principles of the invention are disclosed.Type: ApplicationFiled: July 20, 2012Publication date: January 17, 2013Applicant: Duke UniversityInventors: Tomoyuki Yoshie, Lingling Tang, Samuel Drezdzon
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Publication number: 20110311181Abstract: Various optical isolator embodiments are disclosed. Embodiments comprise a waveguide section utilizing materials that induce a propagation constant shift that is propagation-direction-dependent. Embodiments are characterized by a cutoff frequency for forward propagating waves that is different than the cutoff frequency for reverse waves; the dimensions and direction of magnetization of the waveguide can be tailored so that, in a particular embodiment, the cutoff frequency for forward propagating waves is lower than the cutoff frequency for reverse waves. A particular embodiment is constructed as a single-mode waveguide on a substrate. The cross-section of the waveguide is inhomogeneous in terms of materials. At least one part of the cross-section is a non-reciprocal magneto-optic medium, which has nonzero off-diagonal permittivity tensor components. This inhomogeneity induces a propagation constant shift, which is propagation-direction-dependent.Type: ApplicationFiled: August 26, 2011Publication date: December 22, 2011Applicant: Duke UniversityInventors: Tomoyuki Yoshie, Lingling Tang, Samuel Drezdzon
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Patent number: 8009942Abstract: Various optical isolator embodiments are disclosed. Embodiments comprise a waveguide section utilizing materials that induce a propagation constant shift that is propagation-direction-dependent. Embodiments are characterized by a cutoff frequency for forward propagating waves that is different than the cutoff frequency for reverse waves; the dimensions and direction of magnetization of the waveguide can be tailored so that, in a particular embodiment, the cutoff frequency for forward propagating waves is lower than the cutoff frequency for reverse waves. A particular embodiment is constructed as a single-mode waveguide on a substrate. The cross-section of the waveguide is inhomogeneous in terms of materials. At least one part of the cross-section is a non-reciprocal magneto-optic medium, which has nonzero off-diagonal permittivity tensor components. This inhomogeneity induces a propagation constant shift, which is propagation-direction-dependent.Type: GrantFiled: July 1, 2009Date of Patent: August 30, 2011Assignee: Duke UniversityInventors: Tomoyuki Yoshie, Lingling Tang, Samuel Drezdzon
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Publication number: 20100002988Abstract: Various optical isolator embodiments are disclosed. Embodiments comprise a waveguide section utilizing materials that induce a propagation constant shift that is propagation-direction-dependent. Embodiments are characterized by a cutoff frequency for forward propagating waves that is different than the cutoff frequency for reverse waves; the dimensions and direction of magnetization of the waveguide can be tailored so that, in a particular embodiment, the cutoff frequency for forward propagating waves is lower than the cutoff frequency for reverse waves. A particular embodiment is constructed as a single-mode waveguide on a substrate. The cross-section of the waveguide is inhomogeneous in terms of materials. At least one part of the cross-section is a non-reciprocal magneto-optic medium, which has nonzero off-diagonal permittivity tensor components. This inhomogeneity induces a propagation constant shift, which is propagation-direction-dependent.Type: ApplicationFiled: July 1, 2009Publication date: January 7, 2010Applicant: Duke UniversityInventors: Tomoyuki YOSHIE, Lingling TANG, Samuel DREZDZON
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Patent number: 6580736Abstract: In a semiconductor laser device, a buffer layer, an n-contact layer, an n-light cladding layer, an n-light guide layer, an emission layer, a p-cap layer, a p-light guide layer and an n-current blocking layer having a striped opening are successively formed on a sapphire substrate, and a p-light cladding layer is formed in the opening. A p-contact layer is formed on the p-light cladding layer and on the n-current blocking layer. The n-current blocking layer is made of n-Al0.3Ga0.7N and has an electron concentration of 1×1017 cm−3 and an Al composition greater than 0.1, and the surface thereof is terminated with N.Type: GrantFiled: March 23, 2000Date of Patent: June 17, 2003Assignee: Sanyo Electric Company, Ltd.Inventors: Tomoyuki Yoshie, Takenori Goto, Nobuhiko Hayashi
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Patent number: 5753039Abstract: An object formed of a semiconductor is heated to and kept at such a temperature that a semiconductor crystal formed of a II-VI Group compound semiconductor mainly containing Zn and Se can be grown. A molecular beam including elements constituting the II-VI Group compound semiconductor mainly containing Zn and Se is irradiated onto the heated object, and a gas beam composed of a nitrogen molecule being in a ground electronic state and having a gas pressure of not less than 3.times.10.sup.-5 Torr, to form a p-type semiconductor crystal on the object.Type: GrantFiled: November 28, 1995Date of Patent: May 19, 1998Assignee: Sanyo Electric Co., Ltd.Inventors: Yuji Hishida, Tomoyuki Yoshie