Take the 2-minute tour ×
Ask Patents is a question and answer site for people interested in improving and participating in the patent system. It's 100% free, no registration required.

Shows up as filed in 1682 US4381219 False filing date in Google database.

share|improve this question

put on hold as unclear what you're asking by Ron J., Soren, Robert Cartaino 1 hour ago

Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question.If this question can be reworded to fit the rules in the help center, please edit the question.

Browse other questions tagged or ask your own question.