Some more info from my "digital collection" of info related to Grips for H&R revolvers.
For Christmas this year, I (finally!) just got THEBOOK on H&R Firearms by the late Bill Goforth, and I am really enjoying it. There are many more patents in there on grips, and other functional parts, etc. of these old top-breaks and other firearms too.
Shameless plug: If you like or collect the old H&R firearms, the book is a must-have (and I have no connections to the publisher or seller.)
Here's some info on Target Grips, as an alternative to the smaller standard grips. Several of the top-breaks in my collection have these:
And here's a rather odd and unique target grip adapter... Never seen one of these in the real world yet:
And lastly, here's a "Design Patent" protecting how the grips were marked with the unique company-designed target logo: