| Year | 1928 |
| Date | 10-May |
| Volume | 58 |
| Issue | 1,409 |
| Page | 439 |
| Category | General |
| Part | |
| Title | Models as an Aid to Invention |
| Author | Percival Marshall |
| Notes | Lecture given to the Institute of Patentees on Thursday, April 26, 1928. Models as an aid to marketing, models in the law courts, models as historic records, every inventor his own model-maker, in conclusion |