Thanks. You've nailed it. Maybe I should say you screwed it, but somehow 
that doesn't sound right.

I searched there with no luck, and then realized that some of his 
patents were US, but had no luck there either.

Don

On 2019-04-09 5:54 a.m., Norm Wood wrote:
> Hi Don,
>
> Maybe this Canadian patent?
>
> CA 433507, issued 12 Mar 1946 to Peter L. Robertson for a screw driver.
>
> Here's a link to the search results:
>
> http://www.ic.gc.ca/opic-cipo/cpd/eng/patent/433507/summary.html?type
=number_search&tabs1Index=tabs1_1">http://www.ic.gc.ca/opic-cipo/cpd/eng/patent/
433507/summary.html?type=number_search&tabs1Index=tabs1_1
>
> If you follow the link and click on the "Documents" tab, there's a link
> to a drawing.
>
> Regards,
> Norm
>
>
> On 09 Apr, Don Schwartz wrote:
>> I'm searching for a US patent issued in 1946 to P.L. Robertson for a
>> screwdriver or tool holder, with no insight into why I always get an error.
>> Can anyone help?
>>
>> Don
>>
>> -- 
>> ???It is better to be killed by a woman with a knife than by a man with a
gun.??? Che Guevara
>>
>> A thermometer is not liberal or conservative. - Katharine Hayhoe
>>
>> Of all the tyrannies that affect mankind, tyranny in religion is the worst.
Thomas Paine
>>
>> Being offended doesn't make you right.
>>
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-- 
“It is better to be killed by a woman with a knife than by a man with a gun.”
Che Guevara

A thermometer is not liberal or conservative. - Katharine Hayhoe

Of all the tyrannies that affect mankind, tyranny in religion is the worst.
Thomas Paine

Being offended doesn't make you right.