Patents Held or Pending

Patent # 3,958,231, May 18, 1976, Titled: "An Electronic Push-button, Sequential Time-based Lock System". Wrote patent, designed circuitry, built production prototypes, compiled proforma for investors.

Patent # 5,072,095, Dec. 10, 1991, Titled: "Vessel Warmer Utilizing Timer Reset Means Responsive to Removal of Vessel". Wrote patent.

Patent # 5,087,883, 1992, Titled: "Differential Conductivity Meter For Fluids And Products Containing Such Meters". Wrote patent.

Patent # 5,103,146, April 7, 1992, Titled: "Control For A Remote Radio Operated Device". Device is being marketed for R/C hobbyists. Wrote patent.

Patent # 5,183,998, Feb. 2, 1993, "Apparatus And Method For Heating Water For Diffusion And The Like". Wrote patent.

Patent # 5,384,838, Jan. 24, 1995, "System For Communicating Through Partitions". Filed 05/92 (other patents pending). Wrote patent.

Patent # 5,841,361, November 24, 1998, "KEYLESS LOCKING SYSTEM". Filed March 1996. Wrote patent. (Additional patents are pending regarding enhancements and other applications.)


HOFFMAN ELECTRONICS INC.
33165 Cannon Rd.
Solon, Ohio 44139
PH/FAX (440) 349-2689

e-mail: RJHEE@aol.com