US 7812505

Here's a concise summary of US Patent 7812505:

US Patent 7812505: Summary

• Title: Piezoelectric microspeaker using microelectromechanical systems and method of manufacturing the same
• Assignee: Electronics and Telecommunications Research Institute ETRI
• Inventors: Sang Kyun Lee, Sung Q Lee, Hye Jin Kim, Jae Woo Lee, Kang Ho Park, Jong Dae Kim
• Filing Date: September 29, 2008
• Issue Date: October 12, 2010
• Abstract: A piezoelectric microspeaker using microelectromechanical systems (MEMS) and a method of manufacturing the same are provided. The piezoelectric microspeaker includes a piezoelectric layer disposed on an elastic thin layer, and a resonance change unit patterned on one of a bottom surface of the elastic thin layer and a top surface of the piezoelectric layer.

Plain-Language Overview of Independent Claims:

• Independent Claim 1: This claim describes a piezoelectric microspeaker that includes an elastic thin layer with a piezoelectric layer placed on top of it. A key feature is a "resonance change unit" that is patterned on either the bottom surface of the elastic thin layer or the top surface of the piezoelectric layer.
• Independent Claim 9: This claim describes a method for manufacturing such a piezoelectric microspeaker. The method involves two main steps:
  1. Building up an elastic thin layer, a piezoelectric layer, and an electrode on the top (first) surface of a silicon substrate.
  2. Creating a pattern on the bottom (second) surface of the silicon substrate (opposite the first surface), where this pattern is designed to alter the resonance frequency of the device.

CAFC 2026 Dockets:
As of April 26, 2026, a search of the CAFC 2026 dockets did not return any specific cases directly referencing US patent 7812505. The Federal Circuit's "Scheduled Cases – May 2026" document does not list this patent number. Information regarding litigation history from third-party sources (e.g., Google Patents "Family has litigation" section) indicates that US cases have been filed in the California Northern District Court and Texas Eastern District Court, but these are not CAFC dockets for 2026.Here's a concise summary of US Patent 7812505:

US Patent 7812505: Summary

• Title: Piezoelectric microspeaker using microelectromechanical systems and method of manufacturing the same
• Assignee: Electronics and Telecommunications Research Institute ETRI
• Inventors: Sang Kyun Lee, Sung Q Lee, Hye Jin Kim, Jae Woo Lee, Kang Ho Park, Jong Dae Kim
• Filing Date: September 29, 2008
• Issue Date: October 12, 2010
• Abstract: A piezoelectric microspeaker using microelectromechanical systems (MEMS) and a method of manufacturing the same are provided. The piezoelectric microspeaker includes a piezoelectric layer disposed on an elastic thin layer, and a resonance change unit patterned on one of a bottom surface of the elastic thin layer and a top surface of the piezoelectric layer.

Plain-Language Overview of Independent Claims:

• Independent Claim 1: This claim describes a piezoelectric microspeaker built using microelectromechanical systems (MEMS). It consists of a piezoelectric layer that sits on an elastic thin layer. A distinctive feature is a "resonance change unit" which is a patterned structure located either on the bottom side of the elastic thin layer or on the top side of the piezoelectric layer.
• Independent Claim 9: This claim outlines a manufacturing method for a piezoelectric microspeaker using MEMS. The method involves two main steps:
  1. Creating an elastic thin layer, a piezoelectric layer, and an electrode on one side (the "first surface") of a silicon substrate.
  2. Forming a specific pattern on the opposite side (the "second surface") of the silicon substrate. This pattern is designed to alter the resonance frequency of the microspeaker.

CAFC 2026 Dockets:
As of April 26, 2026, a search of the CAFC 2026 dockets did not return any specific cases directly referencing US patent 7812505. While Google Patents indicates that the patent family has litigation history in the California Northern District Court and Texas Eastern District Court, no corresponding active cases were found on the CAFC 2026 dockets.