← All themesElectrophotographic Photoreceptor Design
Advancements in the structure, materials, and electrical characteristics of electrophotographic photosensitive members, focusing on photosensitive layers, conductive supports, protection layers, and their impedance properties.
4,681 US filings from 470 companies since 2023 · 2023: 1,721 · 2024: 1,571 · 2025: 1,042 · 2026 YTD: 347
Electrography (Xerography)
Top companies
Ranked by filings in this theme since 2023. 2026 is partial.
| # | Company | Since 2023 | 2023 | 2024 | 2025 | 2026 YTD | YoY |
|---|
| 1 | CANON KABUSHIKI KAISHA | 1,540 | 513 | 426 | 433 | 168 | +1.6% |
| 2 | FUJIFILM Business Innovation Corp. | 439 | 115 | 130 | 128 | 66 | -1.5% |
| 3 | Sony Semiconductor Solutions Corporation | 359 | 134 | 182 | 40 | 3 | -78.0% |
| 4 | KYOCERA Document Solutions Inc. | 240 | 60 | 69 | 67 | 44 | -2.9% |
| 5 | BROTHER KOGYO KABUSHIKI KAISHA | 158 | 54 | 59 | 36 | 9 | -39.0% |
| 6 | SAMSUNG ELECTRONICS CO., LTD. | 84 | 47 | 25 | 11 | 1 | -56.0% |
| 7 | HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. | 79 | 27 | 26 | 20 | 6 | -23.1% |
| 8 | Ricoh Company, Ltd. | 78 | 22 | 21 | 29 | 6 | +38.1% |
| 9 | Samsung Display Co., Ltd. | 66 | 47 | 11 | 6 | 2 | -45.5% |
| 10 | Konica Minolta, Inc. | 63 | 17 | 21 | 19 | 6 | -9.5% |
| 11 | SONY GROUP CORPORATION | 62 | 27 | 32 | 3 | · | -90.6% |
| 12 | Panasonic Intellectual Property Management Co., Ltd. | 59 | 26 | 25 | 8 | · | -68.0% |
| 13 | FUJIFILM CORPORATION | 51 | 30 | 17 | 3 | 1 | -82.4% |
| 14 | SHARP KABUSHIKI KAISHA | 49 | 13 | 13 | 17 | 6 | +30.8% |
| 15 | BOE Technology Group Co., Ltd. | 44 | 16 | 23 | 5 | · | -78.3% |
| 16 | Seiko Epson Corporation | 33 | 24 | 5 | 2 | 2 | -60.0% |
| 17 | Japan Display Inc. | 32 | 16 | 9 | 7 | · | -22.2% |
| 18 | LEXMARK INTERNATIONAL, INC. | 30 | 21 | 4 | 5 | · | +25.0% |
| 19 | Taiwan Semiconductor Manufacturing Company, Ltd. | 29 | 13 | 14 | 2 | · | -85.7% |
| 20 | Nippon Telegraph and Telephone Corporation | 28 | 8 | 17 | 3 | · | -82.4% |
| 21 | TOSHIBA TEC KABUSHIKI KAISHA | 26 | 10 | 9 | 6 | 1 | -33.3% |
| 22 | HAMAMATSU PHOTONICS K.K. | 25 | 8 | 16 | · | 1 | — |
| 23 | InnoLux Corporation | 22 | 6 | 10 | 6 | · | -40.0% |
| 24 | Artilux, Inc. | 21 | 13 | 4 | 4 | · | 0.0% |
| 25 | SONY CORPORATION | 21 | 12 | 9 | · | · | — |