US 10339520

Here's a concise summary of US Patent 10339520:

Title: Multi-functional credit card type portable electronic device

Assignee: Virtual Electric Inc. (Original Assignee), Virtual Electric Inc., CardWare Inc. (Current Assignee - Note: The listed assignees may be inaccurate as Google Patents states it has not performed a legal analysis and makes no representation as to the accuracy of the list.)

Inventor: David Wyatt

Filing Date: 2017-09-11

Issue Date: 2019-07-02

Abstract: An embodiment includes a credit card device capable of generating a programmed magnetic field of alternating polarity based on a speed of a card swipe, and methods for constructing the device for the purpose of emulating a standard credit card. An apparatus is described to allow said device to emulate behavior of a credit card when used in electronic credit card readers. Additionally methods are described to allow user control of said device for the purpose of authorizing or controlling use of said device in the application of credit, debit and cash transactions, including cryptocurrency and card-to-card transactions. Methods are also described for generating a limited-duration credit card number when performing a transaction for the purpose of creating a limited-use credit card number, which is limited in scope of use to a predetermined number of authorized transactions. Furthermore said device may interact with other similar devices in proximity for the purpose of funds or credit/debit transfers.

Plain-language overview of independent claims:

• Claim 1: This claim describes a smart card device designed like a credit card. It includes a memory to hold various identification data (like different account numbers), a processor connected to this memory, and a user interface for selecting which identification data to use. The device also has a component to detect if it's near a standard magnetic card reader. When detected, an inductor assembly, controlled by the processor, creates an alternating magnetic field in the area of the card reader. This magnetic field is encoded with the selected identification data and is designed to be read by the magnetic read head of a standard card reader, effectively emulating a traditional magnetic stripe.
• Claim 10: This claim focuses on a credit card device with near-field communication (NFC), a touch sensor array, a display, a motion rate detection array, and a memory storing user data and a currency amount. A processor in the device manages these components. The processor can start a card-to-card transaction between two such devices if they are detected to be close to each other, and if a user inputs information via the touch sensor. This card-to-card transaction involves exchanging stored currency and user data between the two devices using their NFC units.
• Claim 11: This claim outlines a method for performing a transaction using a credit card device. First, the device receives an input signal from a user, which enables its near-field communication (NFC) unit (which was previously disabled). Next, the device receives an indication of the transaction amount. Then, the credit card device generates a "limited-duration" credit card number. Finally, this limited-duration credit card number is transmitted from the device to the recipient of the transaction. This limited-duration number is characterized by having a limited recurrence and being restricted in its use to a predetermined number of authorized transactions.

CAFC 2026 Dockets:
A search for "10339520 CAFC 2026 dockets" did not return specific docket entries for US Patent 10339520 within the CAFC dockets for 2026. However, the provided patent information from Google Patents indicates that there is ongoing litigation related to this patent, including several PTAB cases (e.g., IPR2025-01146, IPR2025-01513, IPR2025-01145, IPR2023-00210, IPR2023-00211) and US cases filed in Texas Western District Court and Texas Eastern District Court in 2024 and 2022 respectively. It also notes "First worldwide family litigation filed." This suggests significant legal activity, although specific CAFC 2026 docket entries were not found in the search results.