| # | Name | Location | Applications |
|---|---|---|---|
| 1. | L&K ENGINEERING (SUZHOU) CO., LTD | 🇨🇳 Suzhou, China | 1 |
| 2. | L&K Engineering Co., Ltd. | 🇹🇼 Taipei, Taiwan | 1 |
| 3. | L. Keith Rogerson | 🇺🇸 Isle of Palms, SC, United States | 1 |
| 4. | L. Kellenberger & Co. | 🇨🇭 St. Gallen, Switzerland | 1 |
| 5. | L. Kellenberger & Co. AG | St. Gallen, un | 1 |
| 6. | L. Kellenberger & Co., AG | 🇨🇭 St. Gallen, Switzerland | 1 |