Patents Represented by Law Firm Hoiman & Stern
  • Shoe usable for walking and roller-skating
    Patent number: 3983643
    Abstract: A shoe usable for walking or roller skating is disclosed wherein the roller skating means is contained within the sole of the shoe. The skating means is selectively engageable so that the shoe can be used with little effort for either mode of transportation.
    Type: Grant
    Filed: May 23, 1975
    Date of Patent: October 5, 1976
    Inventors: Walter Schreyer, Leo Gumbiller
  • Method of testing wear resistance of articles on the basis of polycrystalline cubic boron nitride
    Patent number: 3978711
    Abstract: A method of testing wear-resistance of articles which comprises measuring the rate of propagation of ultrasonic oscillations in a reference article which has the lowest admissible wear resistance. The rate of propagation of ultrasonic oscillations in the articles being tested is compared with the rate in the reference article. The reference article is placed into a liquid in the suspended state and the articles being tested are placed into the same liquid. Those articles, which ascend to the surface, are rejected.
    Type: Grant
    Filed: August 20, 1975
    Date of Patent: September 7, 1976
    Inventors: Boris Aronovich Glagovsky, Anatoly Samoilovich Kamenkovich, Vladislav Sergeevich Lysanov, Igor Borisovich Moskovenko, Garri Shmilevich Roitshtein, Ljudmila Yakovlevna Slavina, Leon Izrailevich Feldgun, Larisa Ruvimovna Frenkel, Alexandr Lazarevich Khait, Galina Alexandrovna Shashkina, Veniamin Alexandrovich Yashin, Zinovy Illich Kremen, Yakov Abramovich Muzykant