To Piotr...

[Carl]

For some reason my emails keep getting bounced back. I checked the PDF's... apparently a bunch of them got deleted off the server. I've replaced them now, download away!

- Carl


>I tried to download all the patents you put on your site, but many does not
>exist (eg http://tthn.com/geotech/misc/patents/US5596277.pdf). What is
>wrong?

[Carl]

Re: To Piotr...

Got your last email, still can't get through to you. Getting "Access denied, IP blocked" error message.

Anyway, I rechecked the patents and everything's there. Don't know what else to say.

What were you referring to on the Fisher patent? Looks like an odd way to orient the boxes.

- Carl

[Piotr]

Re: To Piotr...




Thanks Carl,

I got the files eventually.

As for Fisher, I've just sent you one page of a patent which is earlier than the Fisher's one. Only the boxes are swapped, as you noticed.

I attached the front page so that others may judge for themselves.

I have nothing to Fisher company. I consider their equipement to be one of the finiest in the world. What I claim is Fisher was not the first as you say.

Thanks again.

Piotr

[Carl]

Re: To Piotr...

What matters to the US Patent Office is the date the patent is filed, not when it is issued. Fisher filed his on Jan. 1933 and for some reason it took 4 years to get approved. Barrett filed his Dec 1934 and it took a more reasonable 2 years. But Fisher still beat him to the patent office, and that's what counts.

But that's not the whole story. I think I've found a patent that really does predate Fisher's, I'll have to get a copy to be sure. In any case, Alexander Graham Bell is widely recognized as having really invented the M/D during the Garfield assasination, 50 years before Fisher.

[Piotr]

Re: To Carl...You are right

Yes, I looked at the issue date.

The Fisher patent application was renewed in 1936 so maybe it is the reason why USPO delayed.

Anyway, Fisher was not the first. Seems he is the invetor of a two box detector.

The oldest american patent I saw was issued in 1924. It uses DD coils.

I am curious about the Bell's patent.

Thanks

[Carl]

Re: To Carl...You are right

The 1924 patent must be the one I'm thinking about, too. I may have a copy somewhere. Bell never patented his design.

I fixed 5691640... sorry about that.