I usually buy electronics components at an online surplus store and they usually throw in the box some more goodies to pack what you order.
I bought a multi section plastic container and it was filled with all sort of components, and this one in particular intrigues me. Here is a photo:
They seem to be transistors, maybe their odd shape is because they are RF or something...
Some "old school" guy that has used them?
Transistors in a TO-50 package commonly used in RF applications. The leads can be soldered flat onto the PCB, reducing lead inductance. Can be either some type or FET or BJT.
While they may be what Andy and jippie say, they also MAY be "MMIC"s
Wikipedia - MMIC aka Monolithic microwave integrated circuit.
These often have a 4 lead package with 2 opposite pins being ground, but this is not essential. And a transistor may also have 4 leads with two being ground. The image below is from the above Wikipedia page.
However, to rather meld the answers given - a MMIC "IC" MAY be as simple as a single transistor with internal biasing resistors. Or a pair of transistors. Or much more.
The diagram below is a Mini-Circuits ERA series MMIC amplifier.
Diagram from Mini-Circuits AN-60-10 BIASING MMIC AMPLIFIERS - e.g., ERA SERIES
Which ends up in circuit diagrams looking like this:
This one actually uses all 4 pins for different functions - so yours is not one of these :
BUT, some of these could be - Table 15 from this useful page
But, ALL of these with 4 leads are transistors intended for LNA use (table 1).
