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Glossary 
Patents Index: literature (720 Artikel)
| Abakus in Youtube | to | Campbell-Kelly 2003 |
| Campos-1944 | to | Grattan-Guinness 1990 |
| Grier 1842 | to | Kidwell 1994 |
| Kidwell 2000 | to | Murray 1961 |
| Nagler 1960 | to | Reese 2016 |
| Reese 2016/1 | to | Unger 1898 |
| Usan 1967 | to | Wille 1984 |
| Williams 1983 | to | Zühlke 1952 |