Resources Contact Us Home
Browse by Category: Main > Communications
Class Information
Number: 178/37
Name: Telegraphy > Systems > Printing > Recorders > Privacy (e.g., mechanical packaging or covering of printed message)
Description: Recorders for concealing or secreting the printed message from those not authorized to read it.

Patents under this class:

Patent Number Title Of Patent Date Issued
5031379 Message receiving arrangement Jul. 16, 1991
4809160 Privilege level checking instruction for implementing a secure hierarchical computer system Feb. 28, 1989
4701233 Method for folding and sealing sheets Oct. 20, 1987
4106060 Electronic mail box Aug. 8, 1978
3992571 Differential optical polarization detectors Nov. 16, 1976

  Recently Added Patents
Plants and seeds of hybrid corn variety CH817100
Semiconductor devices and methods for changing operating characteristics and semiconductor systems including the same
Antenna tuning on an impedance trajectory
Methods and apparatus for voltage selection for a MOSFET switch device
ESD protection device and method for producing the same
Medical capsule housing formed by thermal welding
Blended block copolymer composition
  Randomly Featured Patents
Image forming apparatus employing an electrophotographic method
Chair frame
Snack food
Rolling bearing for lengthwise movement
Clip for electronic book reader and cover
Electric pepper mill
Surface-emission laser diode operable in the wavelength band of and optical telecommunication system using such a laser diode
Non-woven composition with antimicrobial protection and use thereof
Cleaning method and cleaning apparatus for performing the same
Disposable chair covers