Patenton — panteon of patents

(19)

RU

(11)

2 084 888

(13)

C1

(51)

IPC

(21) (22)

Application

93019543/28, 1993-04-16

(22)

Actual filing date

1993-04-16

(45)

Published

1997-07-20

(72)

Inventor

Zinchenko V.N.Parfenov B.G.Volga V.V.

(73)

Holder

Firma Ltd

ACOUSTIC METHOD FOR PROTECTING DATA MEDIUM FROM UNAUTHORIZED COPYING Russian patent published in 1997 - IPC

Abstract RU 2084888 C1

FIELD: electronic acoustics. SUBSTANCE: with ultrasound radiated into medium under check, use is made of one or more radiation points and zone under check is given additional acoustic characters. In case of radiation frequency variation, amplitude-frequency or phase-frequency responses of acoustic field are recorded and in case of variations in these responses, information is erased from data medium. EFFECT: improved reliability of data medium protection. 2 cl

Similar patents RU2084888C1

Title Year Author Number
METHOD OF DETECTING UNAUTHORISED ACCESS INTO PROTECTED FACILITIES 2007
  • Shcheglov Mikhail Jur'Evich
  • Kolcherin Dmitrij Vladimirovich
 RU2342708C1
SYSTEM OF MONITORING OF SPECIAL PURPOSE COMPUTERS SAFETY 2016
  • Kozlov Andrej Vladimirovich
  • Panasenko Sergej Petrovich
  • Romanets Yurij Vasilevich
  • Syrchin Vladimir Kimovich
 RU2628458C1
KARAOKE MOBILE SYSTEM, METHOD FOR KEEPING ELECTROMAGNETIC COMPATIBILITY FOR KARAOKE MOBILE SYSTEM, MOBILE WIRELESS TRANSMITTER, CARTRIDGE, METHOD FOR PROHIBITION OF USAGE OF UNAUTHORIZED CARTRIDGES AND METHOD FOR PREVENTING UNAUTHORIZED ACCESS TO DATA STORED IN KARAOKE MOBILE SYSTEM 1999
  • Rovner Ja.Sh.-B.
  • Agadzhanova M.A.
 RU2148862C1
METHOD AND DEVICE FOR ULTRASOUND CONTROL OF OBJECTS IN GUARDED ZONE 2001
  • Podgornov V.A.
  • Bryzgalov A.Ju.
  • Kazakov V.R.
 RU2263969C2
METHOD FOR MASKING OF ACOUSTIC COMMUNICATION LINES 1998
  • Stafeev E.V.
  • Ostapenko A.N.
  • Melekestsev A.V.
 RU2167497C2
METHOD OF DETECTING UNAUTHORISED ACCESS INTO PROTECTED FACILITIES 2007
  • Shcheglov Mikhail Jur'Evich
  • Kemenov Igor' Viktorovich
 RU2342707C1
ALARM DEVICE 2002
  • Krasulin S.B.
  • Sturodubtsev Ju.I.
  • Chernoles V.P.
 RU2231121C1
METHOD OF INSPECTING CONTENTS OF CLOSED VOLUME 2011
  • Mossakovskij Sergej Jur'Evich
  • Podgornov Vladimir Aminovich
 RU2457477C1
CALCULATION OF ESTIMATED ULTRASONIC RADIATION INTENSITY VALUE BY USING INCOHERENT ULTRASOUND PRESSURE SUM FORMED BY PLURALITY OF CONVERTER ELEMENTS 2012
  • Koskela Ilpo Asko Yulius
  • Muzheno Sharl
  • Khakkinen Marko Tapani
 RU2619993C2
METHOD FOR ULTRASOUND CONTROL OF OBJECTS IN GUARDED ZONE 2003
  • Podgornov V.A.
  • Kazakov V.R.
 RU2257618C2

RU 2 084 888 C1

Authors

Zinchenko V.N.

Parfenov B.G.

Volga V.V.

Dates

1997-07-20—Published

1993-04-16—Filed

read Similar patents