Overview about all patents of company Dr. Hell
For patent research we have used the website of German and European
Patent office.
The patents are freely accessible and may therefore be reproduced;
but without modification.
Please also note the usage regulations of the patent offices.
Please also note the usage regulations of the patent offices.
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Abstract of Patents
German
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Encryption patents
German
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| Publication number | Time period of publication |
|
| Patent applications for Dr. Ing. Rudolf Hell personal | ||
| DE000000450187A to DE000000591611A | 1927 to 1934 | |
| DE000000592138A to DE000000718018A | 1934 to 1942 | |
| DE000000719471A to DE000000848660B | 1942 to 1953 | |
| DE000000848970B to DE000000940558B | 1953 to 1956 | |
| DE000000940622B to DE000000978042C1 | 1956 to 1976 | |
| DE000000978065C1 to DE000001151534B | 1978 to 1963 | |
| DE000001157258B to DE000002810430C3 | 1963 to 1981 | |
| Patent registration Dr. Ing. Rudolf Hell as co-inventor (United States) | ||
| US000002113429A to US000002993087A | 1938 to 1961 | |
| US000003034105A to US000003710019A | 1962 to 1973 | |
| Patent registration Dr. Ing. Rudolf Hell as co-inventor (Japan) | ||
| JPH062427B2 | 1994 | |