American Bulldog
Yes,
They are normally not marked by the manufacturer.
No patents either.
The easiest way to tell the difference between a Bulldog made by Harrington and Richardson and Iver Johnson is the trade name normally stamped on top of the frame but sometimes on top of the barrel on later models.
Iver Johnson is "American Bulldog"
****Earliest ones have Eagle grips, spread wing, then perched, then the various dogs head.
Harrington and Richardson is "The American Bulldog"
****Early ones had a Kings Crown at the base of the grips
TIP: The first year production bulldogs had round barrels and are very rare. Less than 1000 made first year for both the H&R and IJ. So if you see one like yours with a round barrel and cheap? Jump on it. Collectors go nuts over them. Again, the serial number is under the left grip on the frame. The round barrel first year you will find normally 1, 2, or 3 digit number only.
There were many trade name variations actually:
American Eagle (Very rare) Made in 1879
Model of 98
Lightning Express
American Bulldog
etc.
**** Also, really rare ones had 1/2 octagon 1/2 round long barrels. I've seen a few that are 8 inches! I have a couple 6 inch 1/2 oct 1/2round with red grips. Those sell for upwards of $800-$1000+...So these aren't junk guns by any means. they are collectable and there is a following.
Murph