Improvements in or relating to implant devices

Implants (50) may be placed in animals in the field with a system including an implanter (10) and cartridge-like container (30) for a plurality of implants. The cartridge is transparent and encloses a plurality of elongated implants arranged side-to-side, transverse to the longitudinal axis of the cartridge. The implants may be moved manually (33) along the longitudinal axis of the cartridge toward one end and stopped in alignment parallel with the end (39) of the cartridge and with one implant aligned with a pair of openings (37, 38) in the cartridge, one opening at each end of the implant. The implanter carries a sharpened tubular needle (25) and a plunger, slidable along an axis aligned with the central axis of the tubular needle. The implanter has an opening (20) into which the cartridge may be fitted and retained. The implanter and cartridge have interfitting surfaces (28a, 28b, 27, 31c, 31d) to position the cartridge with its pair of openings lying upon the central axis of the hollow needle and to retain the cartridge in the implanter so that the plunger may be passed repeatedly through the pair of openings in the cartridge and move the implants, one after the other, through the sharpened tubular needle (25) into the animals. The implants thus are protected from contamination until implantation.