M.Vavatary,
M.I.Mihaiu "The Instalation for Telecontrol an Telesignalisation in
the Undeground Galery with 3 Wires Cable"- Romania Patent Nr. 92994/24 January 1997
Patents
M.Vavatary,
M.I.Mihaiu "The Instalation for Telecontrol an Telesignalisation in
the Undeground Galery with 3 Wires Cable"
- Romania Patent Nr. 92994/24 January 1997
N.Spranceana,
E.Iancu, M.I.Mihaiu "The digital circuit for the subtraction of two
freqencies"
- Romania Patent Nr. RO 99662/16 November 1987
N.Spranceana,
E.Inacu, M.I.Mihaiu "The digital circuit for the addition of two frequencies"
- Romain Patent Nr. RO 99660/16 November 1987