| 000 | 00505nam a22001817c 4500 | ||
|---|---|---|---|
| 001 | 6599 | ||
| 003 | OSt | ||
| 005 | 20190814090910.0 | ||
| 007 | t| | ||
| 008 | 190702s1991 xxu||||| |||| 00| 0 d | ||
| 110 | 1 | _aPatent and Trademark Office <Washington> | |
| 245 | 0 | 0 | _aIndex to the U.S. Patent Classification |
| 250 | _aDec. 1990 | ||
| 264 | 1 |
_aWashington, _c1991 |
|
| 785 |
_iSpäter u.d.T. _tIndex to the U.S. Patent Classification System |
||
| 650 |
_aPatentklassifikation _93471 |
||
| 650 |
_aUSA _94716 |
||
| 999 |
_c4035 _d4035 |
||