| 968 / | HD | HOROLOGY |
| 377 | DD | PROTECTING CLOCKWORKS BY SHIELDS OR OTHER MEANS AGAINST EXTERNAL INFLUENCES, E.G., MAGNETIC FIELDS, ETC. (demagnetizing apparatus subclass 783) [G04B 43/00] {3} |
| 380 | | .~ Antimagnetic alloys (antimagnetic alloys with temperature compensation subclass 129; apparatus for antimagnetizing subclass 783; alloys in general C22C) [G04B 43/00R] |