Krolopp; Robert K.

Patent Applications and Registrations

Patent applications and USPTO patent grants for Krolopp; Robert K..The latest application filed is for "international mobile station identification method and signaling system for cellular radiotelephones and systems".

Company Profile

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Krolopp; Robert K. - Riverwoods IL
Krolopp; Robert K. - Chicago IL
Krolopp; Robert K. - Lisle IL
Krolopp; Robert K. - Hoffman Estates IL

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
International mobile station identification method and signaling system for cellular radiotelephones and systems Grant 6,122,525 - Krolopp , et al. September 19, 2	2000-09-19
Frequency allocation for subscribers of multiple telephone systems having frequency sharing Grant 5,901,357 - D'Avello , et al. May 4, 1	1999-05-04
Method of and apparatus for communicating messages Grant 5,848,072 - Prill , et al. December 8, 1	1998-12-08
Apparatus and method for alternative radiotelephone system selection Grant 5,842,122 - Schellinger , et al. November 24, 1	1998-11-24
Method for locating variable control channels by a mobile station in a radiotelephone system Grant 5,809,421 - Manssen , et al. September 15, 1	1998-09-15
Method and apparatus for determining a serving communication system where communication systems operate conjunctively Grant 5,524,278 - Williams , et al. June 4, 1	1996-06-04
Method for error correction of a transmitted data word Grant 5,463,646 - Dillon , et al. October 31, 1	1995-10-31
Apparatus and method for alternative radiotelephone system selection Grant 5,260,988 - Schellinger , et al. November 9, 1	1993-11-09
Method for error correction of a transmitted data word Grant 5,241,548 - Dillon , et al. August 31, 1	1993-08-31
Communications device with movable element control interface Grant 5,175,759 - Metroka , et al. December 29, 1	1992-12-29
Communications device with voice recognition and movable element control interface Grant 5,148,471 - Metroka , et al. September 15, 1	1992-09-15
Portable telephone with power source/mode change during calls Grant 5,036,532 - Metroka , et al. July 30, 1	1991-07-30
Automatic new radiotelephone system registration notification Grant 5,020,091 - Krolopp , et al. May 28, 1	1991-05-28
Selective system scan for multizone radiotelephone subscriber units Grant 4,905,301 - Krolopp , et al. February 27, 1	1990-02-27
Secure transfer of radio specific data Grant 4,811,377 - Krolopp , et al. March 7, 1	1989-03-07

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