Patent Theme
Resistive & Phase Change Memory
Development of memory cells utilizing resistive switching or phase-change materials, including novel material compositions, multi-layered structures, and integration with selector devices like bipolar junction transistors, to achieve non-volatile storage.
22,083 US filings from 1,221 companies since 2023 · 2023: 5,854 · 2024: 6,853 · 2025: 6,444 · 2026 YTD: 2,932
Specialty Semiconductor Devices (Legacy)Memory Devices (Structural)Inorganic Devices (Thermoelectric, Piezo)
Top companies
Ranked by filings in this theme since 2023. 2026 is partial.
| # | Company | Since 2023 | 2023 | 2024 | 2025 | 2026 YTD | YoY |
|---|
| 1 | Micron Technology, Inc. | 2,980 | 955 | 934 | 724 | 367 | -22.5% |
| 2 | SAMSUNG ELECTRONICS CO., LTD. | 2,621 | 636 | 746 | 789 | 450 | +5.8% |
| 3 | Taiwan Semiconductor Manufacturing Company, Ltd. | 2,014 | 471 | 622 | 705 | 216 | +13.3% |
| 4 | Kioxia Corporation | 1,670 | 444 | 571 | 424 | 231 | -25.7% |
| 5 | SK hynix Inc. | 1,213 | 301 | 358 | 351 | 203 | -2.0% |
| 6 | International Business Machines Corporation | 670 | 249 | 188 | 153 | 80 | -18.6% |
| 7 | UNITED MICROELECTRONICS CORP. | 613 | 152 | 202 | 191 | 68 | -5.4% |
| 8 | CHANGXIN MEMORY TECHNOLOGIES, INC. | 479 | 178 | 143 | 127 | 31 | -11.2% |
| 9 | Taiwan Semiconductor Manufacturing Co., Ltd. | 450 | 142 | 146 | 134 | 28 | -8.2% |
| 10 | SANDISK TECHNOLOGIES LLC | 435 | 183 | 192 | 60 | · | -68.8% |
| 11 | YANGTZE MEMORY TECHNOLOGIES CO., LTD. | 395 | 74 | 102 | 154 | 65 | +51.0% |
| 12 | Western Digital Technologies, Inc. | 303 | 93 | 105 | 98 | 7 | -6.7% |
| 13 | Sandisk Technologies, Inc. | 274 | · | 7 | 153 | 114 | +2085.7% |
| 14 | Semiconductor Energy Laboratory Co., Ltd. | 264 | 56 | 87 | 90 | 31 | +3.4% |
| 15 | NANYA TECHNOLOGY CORPORATION | 263 | 56 | 68 | 95 | 44 | +39.7% |
| 16 | INTEL CORPORATION | 250 | 98 | 59 | 55 | 38 | -6.8% |
| 17 | MACRONIX International Co., Ltd. | 234 | 59 | 68 | 71 | 36 | +4.4% |
| 18 | Winbond Electronics Corp. | 227 | 66 | 63 | 61 | 37 | -3.2% |
| 19 | TDK CORPORATION | 215 | 63 | 58 | 69 | 25 | +19.0% |
| 20 | Taiwan Semiconductor Manufacturing Company Limited | 202 | 51 | 65 | 66 | 20 | +1.5% |
| 21 | Lodestar Licensing Group LLC | 186 | 4 | 90 | 67 | 25 | -25.6% |
| 22 | UNISANTIS ELECTRONICS SINGAPORE PTE. LTD. | 135 | 38 | 49 | 42 | 6 | -14.3% |
| 23 | Kepler Computing Inc. | 128 | 58 | 41 | 23 | 6 | -43.9% |
| 24 | EMEMORY TECHNOLOGY INC. | 104 | 24 | 28 | 34 | 18 | +21.4% |
| 25 | STMicroelectronics International N.V. | 102 | 10 | 27 | 41 | 24 | +51.9% |